Convenience (usability) of the site is considered on the following grounds:

It is necessary to make the site content clear, concise and constructive (when creating the site).
The site should include the menu, categories (subcategories) and the scheme of the site itself.
Simple design.
The column "search" must be placed in a prominent place.
Sections are filled with important and useful footnotes on sites of specific topics.

Website usability

None of the users wants to wait for the page to load for several minutes. Do not load the resource with different images. An acceptable waiting period for your visitors is 2 seconds. Therefore, to create a competitive web service, you should achieve exactly this gap.
It is not recommended to have more than seven headings in the indicative list. In the memory of a person, it is possible to memorize five to nine theses. This should be taken into account when developing your resource.
Nobody wants to spend a lot of time on a long search, moving from page to page. To do this, you need to develop the site so that the user’s transition to the necessary page does not last more than 3 clicks.
Inverted pyramid. High rankings are those web resources whose articles are distributed in the right way, i.e. the beginning of the publication contains the main idea, the key factors are described below and in the end the unimportant information. This style of writing has the highest chance of success. This is due to the fact that the user immediately receives all the necessary information for him.
Fitts Rule. Links with the most views should be placed in the right or left column.
Pareto principle. By making a bias towards the minimum number of critical issues / products / services, you will be able to get the desired result / profit as soon as possible.