Author curve means vote value varies based on how many rewards on a post. Lower rewarded posts require more votes to raise the value, higher rewarded posts get more value per vote.
The reason for this is to discourage and penalize low value comment farming and spam (which frequently has zero curation competition).
Front end burn means you receive less rewards if you do not use the front end for that tribe. For example LeoFinance will penalize authors 20% if they don't use LeoFinance.io, STEMGeeks will penalize 50% if you don't use stemgeeks.net.
Pool is just how the distribution is done. 70% POB Pool means 70% of the daily rewards go to proof of brain, posts and commetns. Mining pool means the tribe has a mining token that gets a portion of the daily inflation. Other pool typically is a % that goes to other features, I believe only LEO uses this to fund wLEO Gyser rewards. Beneficiaries means the tribe takes a cut of all proof of brain to pay the team or to use for something.
Perfect. Very helpful. Thank you very much!