To call is to match a bet or match a raise. A betting round ends when all active players have bet an equal amount. If no opponents call a player's bet or raise, the player wins the pot. The second and subsequent calls of a particular bet amount are sometimes called overcalls.

The short answer is yes  poker still falls under the category of gambling, despite its status as a game of skill. Consider the Merriam-Webster Dictionary definition of gambling: Gambling  the practice or activity of betting; the practice of risking money or other stakes in a game or bet.

A sure bet is when you place bets and not matter the outcome you win automatically. Example if you bet. A sure bet occurs when you use different odds from betting platforms against each other. Sure bets are rare these days because most bookmakers have smart computers doing the work for them.

To find sure 2 odds, you need to research and analyze the teams, players, and events that you want to bet on. You can look at factors such as recent form, head-to-head records, player injuries, and home/away advantage, to identify the teams or players that have a higher chance of winning.