Link attributes are everywhere in the world of SEO, and you can find them in the link title, alternative text, among other places.
The Link title is an optionally defined attribute that gives additional, advisory information about a linked web site. These titles typically clarify or further describe the purpose of a link that visitors should know prior to clicking.
Although they are technically optional, link title attributes are still important, and thus, you should still use them despite their optionality. Like mentioned above, it can help clarify the context of the link, but it can also help control how it’s perceived by Google.
Search Engine Journal has a post that discusses link title attributes and tells us all of the things we should know about it in order to be successful with them.
If you’re interested, check out the post over here!