Describes what the page is about.
URIs with keywords get better rank.
Keyword path URIs help secondary pages gain rank.
The more closely related the page name, page URI and page content are, the better your page will do in search results. Sometimes your domain name might not give any clues as to what you offer. Concise page URIs become more important because Google likes to see page URLs that accurately represent their content. Your visitors will end up appreciating that too.