There are a huge number of web articles online that get no visitors, which Google considers low-priority and doesn't bother indexing. Companies build a site without thinking about search engines and then don't hire professional expertise to help them get search engine traffic, so they fall back on PPC. When a webpage links to any other page, it's called a backlink. In the past, backlinks were the major metric for the ranking of a webpage. A page with a lot of backlinks tended to rank higher on all major search engines, including Google. This is still true to a large extent. Additionally they also usually have low competition due to their specificity; however this comes at the cost of low search volume.
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However, make sure you do not spam or over optimize these areas by stuffing keywords in them. With this in mind, it can be extremely helpful to only search for websites with a certain phrase in their title tag, as opposed to keywords found in other areas of a website, which is what this search operator does. Placing text inside