If I understand correctly, when merging threads, the source threads are deleted and their content is copied to the destination thread. This means the view count and search engine impressions (e.g., Google) are lost along with the deleted threads.
Is there a way to preserve the SEO equity of all source threads? For example, through redirects or cross-links, so users can still easily find related topics?
I think the best way to handle this is to setup a permalink. This can be done in /admin/config/permalinks (under the community section of the admin sidebar)
You’d set the deleted topic as the URL, and add the new topic ID.