You don't have to spend a lot of time on the Internet to learn that not everyone who claims to be an expert on a particular topic really is. A short trip to Paris does not necessarily empower anyone to write the "ultimate definitive guide to visiting Paris and understanding Parisian culture."
The problem is that there's virtually nothing Jewelry Retouching Service that prevents someone from posting what they want online and trying to convince others (and perhaps even themselves) that they're real experts. about it.
That's why Google's algorithms are designed to identify signs that your site's content is truly reliable. One way to do this is basically to evaluate the backlink profile of the site or page.
Backlinks are links that return you to your site from other sites. When other authoritative publishers link to your content on a regular basis, it signals Google that your content is valuable. This will increase your site's ranking on the search results page. Of course, backlinks simply lead more guests to your site.