When you type a domain name into your browser address bar and the domain isn’t found, sometimes you’ll be served a search results page that has advertisements and links related to a “subject” for that domain name.
For example, you might type “usedrugs.com” into the address bar, and there may not be a website at the domain name “usedrugs.com”. You may be redirected to a third-party website, with advertisements and/or links relevant to that domain name. Ads might be shown for the phrase “used rugs” on that web page, if it is determined to be the most likely segmented version of the string of text from the domain name.
Some sites might be filtered from appearing in search results because the domain names may seem to potentially indicate adult related material.
For example, a domain name, such as “mikesexpress.com”, could be filtered out of search results by an adult filter, because the word “sex” appears in the string of characters.