How do you make sure your trades are good

Trade your worst standing pieces for his best standing pieces.
Fischer never had any inactive pieces: he traded them.

Bishops are slightly better than knights on average. It depends on the position. Good knights are better than bad bishops. Good bishops are better than bad knights.

I don't know what "real a comment" means, but you said the opposite of what I said. My useful contribution was what I said. If it isn't useful enough, I'm sorry for that.
I’m certainly no expert but generally if you are up pieces it’s good to trade. Also I’d say that if they have a piece that is very threatening then it might be worth trading. For example if they have a piece behind your defence threatening to do some damage it might be worth trading, especially if that piece isn’t defended or has a lot of back up.
Another time I would say is worthwhile is if moving your piece to safety as oppose to trading would disrupt your setup or otherwise benefit their setup or give them momentum or more opportunities it can be better to just shut it down

Exchanging Pieces In Chess...
https://www.youtube.com/results?search_query=exchanging+pieces+in+chess+
You might also read the chapter 'Exchanging Pieces' (pp. 80-92) of the following book.....it deals specifically with your question....
Weapons of Chess by Bruce Pandolfini
https://www.google.com/books/edition/Weapons_of_Chess_An_Omnibus_of_Chess_Str/3heSKZ4jUQYC?hl=en&gbpv=1&dq=weapons+of+chess&printsec=frontcover
in fact, I recommend to read the entire book.....it's very instructive!
and check out my blog...
https://www.chess.com/blog/RussBell

I don't know what "real a comment" means, but you said the opposite of what I said. My useful contribution was what I said. If it isn't useful enough, I'm sorry for that.
I believe he meant "read", but typed a letter wrong.
Somehow whenever i play my trades are horrible. Does anyone have tips