This is a textformatter module that will automatically replace titles of other pages on your site with links to those pages. For example, if you have a template glossary-term, and mention the exact title of one page using that template in a textfield, the title will be automatically linked to that page (if the textfield uses that formatter). This is good for SEO, and saves you some manual labour. You can configure which templates should get automatically linked, and of course the formatter is on