Users Behavior and quality of traffic.
If before SEO experts focused, and used primarily to promote the quantitative factors, such as the references, the number of keywords in the text and title, anchors, etc., now it is time to move on the qualitative characteristics, improving the design of the site, usability and making web sites for visitors, not for robots.
What is useful to note:
Traffic sources to your website.
Where visitors come to your website, this will help you to understand what resources or search queries use users, to visit your site. It is necessary to monitor developments in your web site statistics. Usually you can find problems with some existing and valuable source, and the emergence of new traffic sources. Perhaps the specificity of new visitors or traffic sources will require additional changes to the site.

Search queries.
Use this information to track new search keywords or phrases that users use to visit your site.
Try to make your visitors to pay attention to your landing pages. For example, you can make a possibility for your visitors, to buy best products. Percentage of users who have committed the act is called conversion. There is a lot of books, about how to increase conversion, but is essential to constantly testing and analyze the effect of the changes. Do not stop to change visual representation of your site, place significant internal links that can help to users to follow the goal.
You must be provide monitoring on the technical parameters of the user’s computer – the screen resolution, browser version, operating system. Sometimes, different browsers and at different resolutions show your site by a different way that you think. Try to take this into account and, if possible, try to check often.
Webmasters commonly used stats counters like Google Analytics or Yandex Metrika, for the analysis, of user behavior. Behavioral factors are crucial, and your efforts targeted to website usability can improve the quality of traffic.








