Q. How do I import Mendeley tags into Zotero?

You can export export notes, PDFs, and tags from Mendeley and then import the items and information into Zotero only if you choose .bib as the export/import file type.

A word of caution: export/import from Mendeley to Zotero does not preserve Mendeley folders or the date you added a citation to Mendeley. If you want to preserve folders, it is best to export one folder at a time. If that's too time consuming or if you have an interest in including the date you added your citations to Mendeley, see Zotero's documentation on importing from Mendeley for a more detailed discussion on export/import tools.

Part or all of this answer is adapted from Zotero wiki content distributed under various Creative Commons licenses. Additional content may have been adapted from the Zotero Research Guide by Jason Puckett and licensed by Georgia State University Library under a Creative Commons Attribution-Noncommercial License.