We're about to start migrating articles from our old site to the new version and I'm a bit curious on how to solve the description/keywords part. I've never worked on this part in EPiServer so I'm a bit lost. What is the correct way to get these fields into the head of the page? Do I have to create the properties in every single page type and use a contentplaceholder to get them up there or is there another way that I've missed?