Share single tab of Google Sheets to selected users and allow them to edit the sheet with two-way sync.

Google sheets only allows sharing the whole spreadsheet. If you want to share a single sheet, you either use publish to web or import range as workarounds.  However, these workarounds has significant limitations. 

Sheet Share helps you share individual sheet/tab without exposing the whole spreadsheet. 

What's more, Sheet Share supports two-way editing, which means editing sheet content at either side is allowed and the editing will be synchronised instantly.