Content pruning means removing obsolete and badly performing content, which will help increase the authority of the site and rankings. The process is as follows:
Step 1: Draw up a list of URLs and their stats.
Step 2: Audit content to identify pages to prune.
Step 3: Assign the tasks for content pruning (Update, Merge, Delete, Hide).
Step 4: Track the outcomes.
The details and examples are in the guide.
https://www.link-assistant.com/news/content-pruning-guide.html