In WordPress 4.2, the link title field from the popup box has been replaced with link text field. Link title attribute text shown when the user hovers over to the link.
But these days when smartphone, tablets and other mobile devices are more active, nobody cares about the link title attribute because it is not seen by most users.
Link title only shows up on desktop and laptops, some people thinks that it is useful for SEO and some only use it for writing a brief text for the link so that their visitors can know where they are going to. Continue reading Restoring Link Title Attribute Field In WordPress 4.2+ Versions