UX (User Experience) refers to how a website feels to use: whether it is intuitive, efficient, and satisfying. UI (User Interface) refers to the visual design of the website: the layout, colours, typography, and interactive elements a user sees and interacts with.
What is the difference between UX and UI?
UX is concerned with the overall experience. A good UX means users can find what they need quickly, complete tasks without confusion, and leave with a positive impression of the brand. UI is one component of UX: the visual layer that communicates the interface.
A website can have an attractive UI but poor UX if the navigation is confusing, important information is buried, or the checkout process has unnecessary steps. Good UX and good UI work together: one without the other produces a website that either looks good but frustrates users, or functions well but feels unprofessional.
How do UX and UI affect SEO?
Google uses behavioural signals such as time on page, bounce rate, and pages per session as indirect indicators of page quality. A website with poor UX, where users leave immediately because they cannot find what they need, sends negative signals to Google over time. Core Web Vitals, which are a confirmed ranking factor, are largely a UX measure: they assess how quickly and stably a page loads. A well-designed UI also supports conversion rate, meaning the same volume of organic traffic produces more leads or sales.
[Screenshot: Google Search Console Mobile Usability report showing a list of pages with usability issues such as text too small to read and clickable elements too close together. Alt text: Google Search Console mobile usability report showing pages with identified usability issues including small text and touch elements that are too close.]
What are common signs of poor UX on a website?
Common UX problems include slow page loading, unclear navigation that makes it difficult to find key pages, calls to action that are not visible without scrolling, forms with too many fields, text that is too small to read on mobile, and pages that require excessive scrolling to reach important content. In Thailand, where mobile accounts for a high proportion of web traffic, mobile UX issues are particularly costly: a site that works well on desktop but poorly on a smartphone loses a significant portion of potential customers before they have had a chance to engage.
How do I improve UX and UI on my website?
Start with data: Google Analytics and Search Console reveal which pages have high exit rates or low engagement, pointing to where UX problems are most acute. Heatmap tools show where users click, scroll to, and ignore. User testing, even informally with a small number of people, surfaces usability issues that analytics alone cannot identify.
For UI, consistency matters: a clear visual hierarchy, legible typography, sufficient white space, and a consistent colour palette make a site feel polished and trustworthy. We assess UX and UI as part of website audits, prioritising changes that are most likely to improve both user experience and conversion rate.
Related KB articles:
• What is Technical SEO
• What are Core Web Vitals and Why Does Google Care About Them
• What is Responsive Web Design
External links:
• Google Search Console, mobile usability report