If your document appears in a search results page, the contents of
the title tag will usually appear in the first line of the results (if
you're unfamiliar with the different parts of a Google search result,
you might want to check out the anatomy of a search result video by
Google engineer Matt Cutts, and this helpful diagram of a Google
search results page). Words in the title are bolded if they appear in the
user's search query. This can help users recognize if the page is
likely to be relevant to their search (2)