There are 2 different variations of online casinos.
No download online flash casinos that can be played instantly in the browser without the need of any software download and internet casinos that can be downloaded from the casinos’ web site.
The software comes for free and can be installed on any computer.
Depending on the speed of the internet connection the casino can be downloaded within minutes.
Casinos often let the players install only parts of their casinos on a computer like the lobby and a few games at first.
All the other games can be downloaded later for example in the background while playing the already installed games.
This has the advantage that the player doesn’t need to wait too long until being ready to play as some download casinos offer more than 200 games.
Poker players for example don’t need to download all the slot games but can concentrate on their favourite game.
Online poker pooms are also available for downloading. Players from all over the world can play poker games against each other from the comfort of their home via the internet.
After registering as a real or fun player, depending on if playing for virtual or real cash the games can begin.