RRT: Remove redundant tags is a panel from Adobe, an extension that triggers behavior within Premiere Pro to remove redundant tags from markers. It is built around one specific, rare situation: the introduction of redundant marker tags.
Unless you have already encountered that particular Premiere Pro issue, the panel will not do anything for you. Adobe is candid on this point and recommends installing it only when an Adobe representative has directed you to it. Outside of that rare set of circumstances, there is nothing for the extension to act on.
The current release is version 1.0.0, last updated on 2025-05-29, and it works with Premiere Pro 14.0 and later. It is listed here as free, with current licensing available on the developer's page.