Tags

If you add a tag cloud widget to the sidebar, the visitor will be able to locate pages with a given tag. The resulting page titles and an excerpt of the content will be displayed for any matching content. This utilizes the standard WordPress tag archives mechanism.

The page heading will be clickable in the tag results.

All my tags are gone?!

They are most likely not gone. Try switching back to your old theme and then switch to the DocsMatter theme again. This action will force a tag taxonomy recount.

Private pages

Private pages are only included in tag results if the visitor is logged in and has the read_private_pages capability.