Up term explained
Up is an abbreviation for the word update, which means update of search results. In SEO update called the update issue.
Every day people are monitoring the position of site in search engines, because of the position depends traffic and, accordingly, the conversion and revenue. In the days of ups on SEO forums SEOs are discussing positive or negative changes, their observations and other issues associated with updated
Update results Google is a change in the position of many sites in the search results for some queries. Also under UP often understand updating the cache of website in search engines.
Ups happen for many different reasons: either the update algorithm of the search engines or update the search database (which includes the recalculation of certain parameters).