@cobito:
I didn't know that loading time was a determining factor when evaluating the quality of a site, but from now on I will take it into account.
The use of plugins usually affects loading time. In the case of caching, you have WP cache which works quite well. Loading time is a determining factor, since a high loading time implies a high bounce rate and affects positioning directly. Regarding links, if they come from farms, Google doesn't like it. Panda 4.0, which appeared on May 20th, has penalized important sites like ASk or ebay for the content issue. The new algorithm prefers backlinks to entries rather than the Home, although many SEO gurus insist on saying the opposite. For a long time now, Google has been directing its algorithm towards content and semantic search, and not for keywords. Time will tell.