Exchange advertising posts

There is a blog offering to trade SEO articles with my website and they
Is there anything I need to pay attention to when trading like this?

Check their site metrics first — traffic quality, spam score, real backlinks. A lot of these “trades” are from dead sites that’ll just leak link juice. Content relevancy matters too, don’t swap with completely random niches if you care about long-term rankings.

Do some deep research as stated above
Make sure that it really worth it, there are many blogs with inflated metrics manipulating their DR and DA stats