User-dependent factors is a group of elements, that includes:
1) Number of visitors of your site/page, including those not from SERs (type-ins, links from other websites, etc.)
2) Site/page CTR in SER – the better your snippet is, the bigger is CTR, the better are UDFs.
3) Behavior of site users on it’s pages, viewing-through depth, time spent on the site/page, bookmarking and other actions.
4) Other factors, related to user’s actions.
Yandex is gathering information from SERPs (snippet clicks, turn-backs to the search page, etc.), cookies, Yandex.Bar and other sources it can reach. There is no way to affect those factors directly (and we are not implying you should try to boost UDF in an unnatural way – that can cause exactly opposite result).
Thus there are few easy-to-follow recommendations to improve user-dependent factors on your site.
1) Check snippets by keyword. Webeffector has a handy tool for this, but in Russian. I guess, English-speaking web also has something to deal with it. So try making your snippet to have exact match keyword in it, don’t be cut in the middle and answer the question, that user is asking with his search query. Do not do snippet that is not resembling user’s queries (like saying “FREE!!!” for knowingly paid service – that would cause users to come to your site and turn back to search engine pretty quickly showing Yandex, that the page is not relevant for given query.)
2) Analyze page statistics regarding “bad” visits – non-target visitors, that leaves page in no time. Functional needed is widely available in almost every statistic-tracking systems, say Google Analytics. If you use context ads – you should analyze your campaign for non-target visits. Those visitors are not solely never convert into your customer, but also they can make a negative contribution in your ranking by certain user-dependent factors. Reverse is also true – for new website, finely tuned campaign for attracting target visitors from context advertisement, banners and other traffic sources could become a very valuable contribution improving UDF.
3) Check pages on being relevant to user’s query. You shouldn’t land queries for pages, that are not contain complete information on subject. There is an old SEO recommendation to spread keywords among several pages, that are maximally relevant to certain queries.
4) Work on site’s usability – make fonts readable (color, size, positioning, highlighting valuable pieces of information, etc.), check contact data availability (especially for commercial sites), cross-browser compatibility, correct encoding (for non-english characters), overall users’ experience. We recommend installing Google.Analytics, Yandex.Metrics and\or Webvisor for better comprehension of user’s behavior.
5) If the project you run is not commercial – try your audience to settle down on your site, bookmark it or remember it’s domain name.