Within the 4D Tools program, the Recover by Tags option is listed under the "Repair" tab. This indicates that this feature should only be used when trying to repair the data file, not as a maintenance tool. The following requirements should be met first before performing Recover by Tags:

-The data is corrupt (4D or 4D tools may detects errors).
-A "clean" backup is not available.
-The Quick Repair features in 4D Tools do not fix the errors.
-All other options have been exhausted.

This feature should be seldom used and should never be performed on a regular basis. The Recover by Tags feature should be used as a last resort, when all other options have failed. If it is not clear why this is the case these Tech Notes may be of interest:

The 128th Byte:
https://kb.4d.com/assetid=15348

At the Core of the Data: The Address Table and Bit Table:
https://kb.4d.com/assetid=15349


Other Related resources:

Recovering a damaged data file:
https://kb.4d.com/assetid=36397

Generic Full Data Export-Import Routine:
https://kb.4d.com/assetid=41862

Recover by Tag with Multiple Segments:
https://kb.4d.com/assetid=33357

Optimal use of a recover by tag:
https://kb.4d.com/assetid=26205