Basically it means that a link to your site from another site whose subject matter is similar to yours carries more weight than a link that comes from elsewhere. The “Trust” quotient is a measure of a page’s authority and how qualified it is to make a good “vote” (link) to a page. Certain sites like government websites from example, have a high level of trust. But this is due to the nature of their content and the links that point to them – not because they have .org or .edu as their suffix as many people tend to think.

Therefore, it’s worthwhile expending a lot of effort to get links from authority websites instead of trading links with unrelated blogs. Of course, this is easier said than done as a lot of people would give a lot to be linked to from these sites. But then that’s why they’re worth it! If everyone would be doing it, then it wouldn’t be valuable.