The title attribute does provide a mouseover tooltip, but for users who are not using a mouse (e.g. they are browsing the web on their phone), there is often no

The title attribute does provide a mouseover tooltip, but for users who are not using a mouse (e.g. they are browsing the web on their phone), there is often no reasonable way to access the title text. For example, as far as I'm aware, iOS Safari will only show title text for images. I see this as primarily an issue with the browser, but until Apple and others implement such functionality into their browsers, it's up to the web developer to ensure those users are able to access the title text.