Usability and the utility, not the visual design, determine the success or failure of a web site.

Since the visitor to the page is the only person who clicks the mouse and therefore decides everything, user-centric design has become a standard approach for successful and profit-oriented web design. After all, if users can’t use a feature, it might as well not exist.

Most users search for something interesting (or useful) and clickable; as soon as some promising candidates are found, users click. If the new page doesn’t meet users’ expectations, the Back button is clicked and the search process is continued.

• Users appreciate quality and credibility. If a page provides users with high-quality content, they are willing to compromise the content with advertisements and the design of the site. This is the reason why not-that-well-designed web-sites with high-quality content gain a lot of traffic over years. Content is more important than the design which supports it.
• Users don’t read, they scan. Analyzing a web-page, users search for some fixed points or anchors which would guide them through the content of the page.
• Web users are impatient and insist on instant gratification. Very simple principle: If a web-site isn’t able to meet users’ expectations, then designer failed to get his job done properly and the company loses money. The higher the cognitive load and the less intuitive the navigation, the more willing users are to leave the web-site and search for alternatives.
• Users don’t make optimal choices. Users don’t search for the quickest way to find the information they’re looking for. Neither do they scan web-pages in a linear fashion, going sequentially from one site section to another one. Instead users scan; they choose the first reasonable option. As soon as they find a link that seems like it might lead to the goal, there is a very good chance that it will be immediately clicked. Optimizing is hard, and it takes a long time. Scanning is more efficient.
• Users follow their intuition. In most cases users muddle through instead of reading the information a designer has provided. Users act like “If we find something that works, we stick to it. It doesn’t matter to us if we understand how things work, as long as we can use them. If your audience is going to act like you’re designing billboards, then design great billboards.”
• Users want to have control. Users want to be able to control their browser and rely on the consistent data presentation throughout the site. E.g. they don’t want new windows popping up unexpectedly and they want to be able to get back with a “Back”-button to the site they’ve visited before: therefore it’s a good practice to never open links in new browser windows.