You should learn to use the internal market which is found on this link:
https://wallet.hive.blog/market
The first column on the page lets you buy HIVE with HBD. The second lets you buy HBD with HIVE. IT is a simple exchange that lets you trade between currencies.
The Convert Button does strange things. It is the mechanism that pegs HBD to the dollar.
HIVE guarantees that users can get $1 USD for 1 HBD. The convert HBD to HIVE button will burn the HBD and create $1.00 worth of HIVE. There is a 3.5 day delay and they charge a 5% fee. So, you should only use the convert process if the price of HBD is less than 0.95.
The convert HIVE to HBD process behaves in a similar fashion. You should only use it when the price of HBD is over 1.05.
In most cases it is best to use the internal market for your conversions.
PS: There is also pHBD HBD swap used for polygon. I think you should learn the internal market first
https://wallet.hive.blog/market
Posted Using LeoFinance Beta