/Your website should give the impression of a serious project.
A good interface is the politeness indicator. Think of a visitor of your website as an interlocutor. And to make a positive impression, follow the same rules of decency as in everyday life.
The clean is the absence of a dirt. The errors on the site are felt just like the wrinkled clothes. The corrupt links, inaccessible images, broken design and disabled buttons - all of these causes a rejection just like a bad breath does. Monitor the functional performance and take an action if errors occur too often.
The user must always understand where he is and feel responses of the website to his touches. If the user performs an action and the site doesn't respond or it responds not adequately then the user will experience embarrassment.
In order not to cause a feeling of embarrassment, provide each page with one understandable header. It will explain to the user where he is. If the user opens a non-existent page, then the custom 404 page should appear to him.
The link to the page itself is called cyclic link. Imagine a situation when the user clicks on a link, but the same page opens. This doesn't meet user's intuitive expectations and causes a dissonance.
Knowing of limits
Too heavy page repels users. Try to keep the size of the html code less then 120kb per page. You can always add the content dynamically when the user scrolls down the screen, as Instagram does.
The choice of your website design depends on the audience you are aiming to win. We have listed the recommendations that are relevant to any appearance. Our service will help your to find these problems and many other ones.