Search engines like Google want to gather specific information that they can then communicate to their users. This includes a title, description, and keywords. In technical terms, these are known as Meta title, Meta description, and Meta keywords.
Every page is equipped with this information. By default, it is filled based on the information you've added to the website, but you can customize this information yourself under the SEO section in Dock. Come up with compelling terms and write good content to make the most out of search engines.