Hello Bart Stelder,

As mentioned by Ermin you can get the overview and features of Link Tracker module at : https://www.odoo.com/page/link-tracker

But if you want to explore more like Tracking, Analyzing and Optimization of campaign with ODOO Link Tracker then navigate and explore at : https://www.odoo.com/blog/odoo-news-5/post/how-to-easily-measure-the-roi-of-all-your-marketing-campaigns-309

It would give you a overview in depth on Link Tracker module and about its working.

Hope this helps.

Thanks

There is not too much to tell about, see here: https://www.odoo.com/page/link-tracker