This is some sort of a forced bet that all players have to pay before the cards are dealt. The ante have to be paid by all the players at the table each round and will not count as bets made but are in the form of entry fee to the round.
This is different from the blinds which are paid by two different players each round. Five Card Draw and Seven Card Stud use antes. The blinds and antes are ultimately determined by the house rules.
A tournament that has blinds is usual to add antes after a given blind level that every player has to pay regardless of whether they paid the blind or not.