exchanging cryptocurrencies

What conditions should be considered when choosing an online platform for exchanging cryptocurrencies?

When choosing an exchanger, please firstly pay attention on its having an additional check and official registration, reviews of other users, the state of the exchanger's website as well as the current status of the exchanger to exchange bat bnb or other currency pairs in BestChange monitor https://www.bestchange.com/bat-to-binance-coin.html . When making transactions, remember that in many payment systems they are non-refundable.