I'm working on very large existing Drupal site that has thousands of nodes, user in it and bunch of Taxonomies as well.

I understand very well that Drupal core generates default URLs (taxonomy/term/tid) as we create a taxonomy term but my requirement is not to so is there a way we can control it?

Updated

Actually, I'm working on SEO of the site so according to the SEO report there are more than 10K redirections to 404 page from the Location taxonomy term pages (URL aliases generated by pathauto module and redirected by custom code to 404). So the owners want to reduce 404 redirections.

I was thinking I can achieve this

• By deleting URL aliases of terms so aliases URLs'll not be listed in the google search (would be less SEO friendly) and user'll not try to access, by this way we can reduce 404 redirection.
• By deleting taxonomy/term/tid, path to such terms will permanently removed so I'll also help to reduce 404.

What do you suggest?