I've upgraded EPiServer 5 to version 6 R2. In this document here it says that there is Seo tab: http://webhelp.episerver.com/cms/6.1/en/UserInterface/Tabs/IN_TabsInEditMode.htm
However I don't see such tab and properties after the upgrade. Is there a configuration option to enable them? Or I have to add them myself. I saw that in AloyTech example site there are active and the implementation is inside the header control. Should I do the same in order to add support for metatags?
Yes you need to create this yourself. You'll also need to make sure your code uses the SEO information (meta description, meta keywords etc). See the demo templates for examples.
Hope this helps.
Thanks, This is what I needed to know. :)