I just bought a domain using some Bitcoin and I visited the transaction page on Blockchain.com and it said that this address (me) payed 40% more fees due to inefficiencies in older wallets.
So I've heard of segwit, but is that what they mean? Do they mean bech32 address?
Hope someone can anser my question, thanks.
Because someone has already answered, and I think the answer given by @jackg is also very correct. So on this occasion I just want to give a little extra through two references that I have read and looked at carefully which might also help you to understand more deeply about the thing you are asking about. Please open and read the two sites below because I can't parse everything here