What are the biggest mistakes when creating a website?

A suc­cess­ful website thrives on clear structure, appealing design, and technical op­tim­isa­tion. However, many website operators re­peatedly make common mistakes that affect user-friend­li­ness, vis­ib­il­ity, and legal com­pli­ance. In this article, we highlight the most important pitfalls and how you can avoid them with best practices and modern website builders.

Mistake 1: Over­loaded or cluttered design

Design is one of the most important success factors for a website. If the visual and struc­tur­al design is not carefully planned, visitors may quickly lose interest and leave. A good design should present content in an appealing way and provide a pleasant user ex­per­i­ence. The following are common mistakes you should avoid:

• Too many different fonts and sizes: Using multiple fonts and in­con­sist­ent sizes can make your layout look chaotic and un­pro­fes­sion­al. Instead, choose a con­sist­ent font family and adjust sizes according to the im­port­ance of the in­form­a­tion.
• Difficult colour com­bin­a­tions or overly bright colours: Strong or un­pleas­ant colour contrasts can distract from the content and reduce read­ab­il­ity. Use har­mo­ni­ous colour com­bin­a­tions that are easy on the eyes and improve legib­il­ity.
• Design that distracts from content: Overly flashy or cluttered design can draw attention away from the actual in­form­a­tion. The design should support your content, not over­shad­ow it.
• Conflict with the corporate image: If the design clashes with your company’s values and per­son­al­ity, it can damage trust. Ensure your design reflects pro­fes­sion­al­ism and aligns with your corporate identity to create a positive per­cep­tion.
• Excessive use of in­ter­act­ive elements and an­im­a­tions: Too many moving or in­ter­act­ive elements can overwhelm users and slow down your site. Only include them when they add real value to the user ex­per­i­ence.
• Careless use of design trends: Trends like dark mode or min­im­al­ism can be appealing, but they must be im­ple­men­ted thought­fully. If they don’t suit your target audience or website content, they can harm the user ex­per­i­ence.

An appealing design with ap­pro­pri­ate colour effects should be both aesthetic and func­tion­al. It must promote the usability and read­ab­il­ity of the website while re­flect­ing the corporate image. Avoid excessive focus on design trends and ensure the design clearly supports the content rather than over­shad­ow­ing it.

Mistake 2: Com­plic­ated nav­ig­a­tion and user guidance

Clear nav­ig­a­tion is crucial for the user-friend­li­ness of your website. Visitors should be able to find content quickly without becoming confused. Faulty or com­plic­ated menu struc­tures often cause users to leave the site pre­ma­turely. The following aspects are par­tic­u­larly important:

• Mobile-first design: Since Google now uses the mobile version of your website for ranking, nav­ig­a­tion must be as intuitive on smart­phones and tablets as on desktops. Ensure menus are clearly visible, buttons are easy to click, and there is a logical hierarchy of page content.
• Content pri­or­it­isa­tion: Ensure that the most important in­form­a­tion is visible first and that users can reach it directly. Submenus should be logically grouped to allow users to quickly orient them­selves.
• Ac­cess­ib­il­ity. Ac­cess­ible nav­ig­a­tion is crucial for everyone, es­pe­cially for people with dis­ab­il­it­ies. This includes:
• Clear and con­sist­ent menu structure: The nav­ig­a­tion order should be logical and pre­dict­able.
• Keyboard nav­ig­a­tion: All menus and in­ter­ac­tions must be operable without a mouse.
• Screen reader com­pat­ib­il­ity: Texts, links, and buttons must be properly labelled so that screen readers can recognise them.
• Contrast and font sizes: Ensure suf­fi­cient colour contrasts and scalable font sizes for optimal read­ab­il­ity.
• Call-to-Action elements (CTAs): Stra­tegic­ally place CTAs to guide users to desired actions (e.g., purchase, news­let­ter sign-up). They should be highly visible, clearly labelled, and ac­cess­ible to all users.
• Avoid over­loaded menus: Too many menu levels or com­plic­ated dropdowns make nav­ig­a­tion difficult. Ensure a good user ex­per­i­ence design by keeping menus simple and clear, with well-defined cat­egor­ies.

Suc­cess­ful nav­ig­a­tion combines mobile-first design, content pri­or­it­isa­tion, ac­cess­ib­il­ity, and strategic CTAs. This not only increases usability and con­ver­sion rates but also ensures your website is ac­cess­ible to all user groups and performs well in search engine rankings.

Mistake 3: Lack of timeli­ness

Outdated content can harm both the user ex­per­i­ence and your search engine rankings. To keep your website relevant and pro­fes­sion­al, it’s important to review and update it regularly. The following aspects are es­pe­cially important:

• Regular content updates: Use a content man­age­ment system (CMS) to update content easily and quickly. This makes it simple to add new in­form­a­tion, offers, or company news as they arise.
• Events and dates: Keep in­form­a­tion on events, webinars, or company activ­it­ies current so visitors always find accurate dates and par­ti­cip­a­tion details.
• Company design and branding: Regularly review corporate design elements, logos, colours, and fonts to ensure your web design aligns with your current brand identity.
• SEO op­tim­isa­tion of existing content: Updating content can improve search engine rankings. Regularly review and refine keywords, meta titles, and de­scrip­tions.
• Review of external links: Outdated or broken links can hurt both user ex­per­i­ence and SEO. Conduct regular link checks and update them as needed.
• Images and media up to date: Make sure graphics, videos, and downloads are up to date and fully func­tion­al.

A current website signals pro­fes­sion­al­ism, builds trust with visitors, and strengthens your SEO per­form­ance. Regular content main­ten­ance, SEO ad­just­ments, and link mon­it­or­ing are therefore essential.

Mistake 4: Ignoring ac­cess­ib­il­ity and legal found­a­tions

Legal com­pli­ance and an ac­cess­ible design are essential for every website — and neg­lect­ing them can lead to fines, legal action, or repu­ta­tion­al damage, es­pe­cially for com­mer­cial projects. The following aspects are par­tic­u­larly relevant in the UK:

• Data pro­tec­tion (UK GDPR and DPA 2018): Websites must comply with the UK GDPR and the Data Pro­tec­tion Act 2018. This includes pro­cessing personal data lawfully, having a clear privacy policy, and using cookie consent banners in line with the Privacy and Elec­tron­ic Com­mu­nic­a­tions Reg­u­la­tions (PECR).
• Ad­vert­ising and consumer pro­tec­tion rules: The Ad­vert­ising Standards Authority (ASA) and the Com­pet­i­tion and Markets Authority (CMA) require that ad­vert­ising and sponsored content be clearly labelled. All marketing claims must be honest, accurate, and not mis­lead­ing.
• Ac­cess­ib­il­ity (Equality Act 2010 / WCAG): Under the Equality Act 2010, websites must be ac­cess­ible to people with dis­ab­il­it­ies. Follow WCAG guidelines: provide alt text for images, captions for videos, logical nav­ig­a­tion struc­tures, and full keyboard ac­cess­ib­il­ity.
• Mobile-first design: While not legally required, a re­spons­ive layout is best practice for both ac­cess­ib­il­ity and SEO. It ensures your site works seam­lessly on mobile devices, which is critical for modern users.

Summary:

Meeting UK legal re­quire­ments — es­pe­cially regarding data pro­tec­tion, trans­par­ency, and ac­cess­ib­il­ity — improves trust, pro­fes­sion­al­ism, and reach while reducing legal and repu­ta­tion­al risks.

Mistake 5: Neg­lect­ing re­spons­ive web design or a mobile version

A re­spons­ive web design is essential nowadays, as visitors access your website from various devices – from smart­phones and tablets to desktop PCs. Google has in­tro­duced ‘Mobile first’ indexing, meaning the mobile version of a website is primarily assessed for ranking. Websites without mobile op­tim­isa­tion receive lower place­ments in search results.

Important points:

• Mobile SEO: Content, images, and forms must be optimally displayed on mobile and be user-friendly. Loading times, nav­ig­a­tion, and buttons should be spe­cific­ally adapted for touch­screens.
• Re­spons­ive design frame­works: Frame­works like Bootstrap or Found­a­tion help create flexible layouts that auto­mat­ic­ally adapt to different screen sizes.
• Content op­tim­isa­tion: Ensure important content and call-to-action elements (CTAs) remain highly visible on mobile devices, while less relevant content can be reduced or hidden.

Opting out of re­spons­ive design not only affects user-friend­li­ness but can also sig­ni­fic­antly harm vis­ib­il­ity in search engines. A ‘Mobile first’ design is now the standard and crucial for your website’s success.

Mistake 6: Not op­tim­ising load time

The load time of a website sig­ni­fic­antly impacts user ex­per­i­ence and search engine ranking. Slow pages lead to higher bounce rates and poor vis­ib­il­ity on Google.

Key points:

• Core web vitals: Google evaluates load time, in­ter­activ­ity, and visual stability as ranking factors. Op­tim­ising these metrics improves both SEO and user ex­per­i­ence.
• Image op­tim­isa­tion: Use modern image formats like WebP, compress images, and implement Lazy Loading so that content loads only when scrolled.
• Content Delivery Networks (CDNs): CDNs reduce load times by de­liv­er­ing content from servers that are **geo­graph­ic­ally closer to the user.
• Ad­di­tion­al per­form­ance tips: Min­im­ising CSS and JavaS­cript, browser caching, and server-side op­tim­isa­tions also con­trib­ute to faster load times.

A fast website is not only user-friendly today but also a crucial SEO factor.

Mistake 7: Un­en­cryp­ted data trans­mis­sion without SSL/TLS

An un­en­cryp­ted website com­prom­ises user data and can sig­ni­fic­antly undermine trust. At the same time, HTTPS is a ranking factor for Google.

Key points:

• HTTPS & SSL/TLS: TLS cer­ti­fic­ates encrypt data trans­mis­sion and protect sensitive in­form­a­tion. Google also favours secure websites in its rankings.
• Free cer­ti­fic­ates: Many hosting providers, including IONOS, offer free SSL cer­ti­fic­ates that can be installed quickly and easily.
• SEO and trust: HTTPS improves search engine rankings and builds user trust, as secure con­nec­tions are shown by the padlock symbol in the browser.
• Best practices: Regularly check that all sub­do­mains and resources load via HTTPS to prevent mixed content issues.

A website without HTTPS is neither secure nor com­pet­it­ive in terms of SEO and user trust.

Build your website easily with a website builder

Using a website builder for your web presence helps you avoid many common mistakes right from the start. A website builder is easy and intuitive to use — and you don’t need to worry about source code at all. With numerous templates and an ef­fort­less drag-and-drop function, you can quickly customise your website for both personal projects and business use.

Benefits of a website builder at a glance:

• Easy to use: No knowledge of CSS or HTML is required.
• Pro­fes­sion­al templates: Choose from industry-specific templates that are visually appealing, well-struc­tured, and ac­cess­ible.
• Custom content: Insert your own images or use stock images from the archive and edit them directly. Built-in tips help with layout and content pri­or­it­isa­tion.
• Re­spons­ive design: Your site auto­mat­ic­ally adapts to smart­phones, tablets, and desktop devices. Mobile SEO and ‘Mobile first’ indexing are already con­sidered.
• Search engine friendly: Content is delivered SEO-optimised, including meta tags, struc­tured data, and fast loading times.
• Security: Data trans­mis­sion is encrypted via SSL/TLS according to current standards.
• Ac­cess­ib­il­ity: Many website builders follow basic web ac­cess­ib­il­ity prin­ciples to ensure your site is usable for people with dis­ab­il­it­ies.
• Included extras: Own domain, email addresses, and optional online store with payment and shipping options.

The Website Builder from IONOS, for example, is very easy to use yet delivers out­stand­ing results. With this builder system, you can publish your website with minimal time in­vest­ment — and without any knowledge of CSS or HTML. All you need is a clear concept of the content you want to display.