"Related to" only means that there is some kind of connection while "relating to" indicates something that is about the topic. For instance, if I asked for websites relating to english.stackexchange.com, I might expect to get meta.english.stackexchange.com, maybe some news articles that cover the site, and a blog entry by a founder. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.