Are archival posts necessary?

Question

Search Engine Optimization

Good afternoon!
Introductory:
There is a website for a company that has several different stores. On the site we post discounts, or rather our flyers from stores, but in regular JPG format. They are laid out as posts with a title like "NashShop Promotions from January 1 to January 15", NC traslit + some text (1-2 paragraphs) and the rest, these are pictures, of course with ALT.
Bottom line:
We have already accumulated about 50 such posts, archival, past promotions.
Do I need to leave them, is it good? Or would it be better to have a single promotions page that just updates the content?
Thank you for your attention

Answer 1

The more pages in the index, the better. I see no reason to remove them.