This is also something that isn’t really associated with your skills at online poker, but again it can/will impact your potential profits.
A lot of new players tend to ignore who their actual opponents on the table are and for that reason they simply join the first game they see. THAT is one of the biggest mistakes you can do in this game! Again you can question why does it matter who I play against if I’m a good poker player? Well, the real question should be:” Why risking to lose a lot of money against a Shark if I could be as well winning a lot of money against a Fish? “
Shark = Very experienced player who probably plays semi/full professional (he pays his bills with online poker)
It won’t be easy to play a Shark since he will try as hard as possible to minimize your potential winnings against him, but also he is going to try to take as much money from you as possible.
You can determine whether a player is a Shark or not if you check his buy in and the number of tables he is playing. Multiple table players usually are very good and dangerous player and for that reason they are called Sharks.
Fish = This is usually a newbie to the game and he lacks a lot of experience. It makes him very profitable for you.
The most easy way to determine if a poker player is a Fish or not is to see how many tables he plays at the same time and also does he buy in with the max. buy in? If he neither does play more then one table nor does he play with the max or he is allowed to buy in then he is very likely a Fish.