I'm a bit confused. On my WordPress site, I want to delete a few categories and tags, and rename a couple of categories. For the categories and tags that I delete/rename, do I have to perform some kind of redirect to prevent getting a page-not-found error? What is the proper SEO-friendly way of deleting/renaming categories and tags? Forgive my ignorance!
Simply put, deleting category/tag entries will also invalidate the associated page links. To fix page-not-found errors, I'd recommend installing the Redirection plugin and set up redirects for the category links you're about to delete. The plugin will also catch all other (if any) broken links to your website so have fun