During October 1, update, replaced "Join in Progress" matchmaking system with "Queued" matchmaking. Searching for a selected game mode is available from Main menu in "Find a Game" or by creating Lobby via "Play with Friends" menu item. Currently in beta, Prime Account Matchmaking was added as part of the April 21, update. Starting with the June 15, update, a profile rank of Lieutenant Rank 21 or above is also needed to participate.
Valve's new CS:GO matchmaking system considers your overall behavior on Steam | PC Gamer
Last year we launched Prime Matchmaking with the goal of providing a better matchmaking experience. Initially the system simply matched players who linked CS: GO with a unique phone number. Later, the system additionally required in-game experience players needed to reach rank As these constraints were added, the Prime status created a hard boundary in the CS: GO community, and players who might otherwise be perfectly happy playing together were separated.
Valve's new CS:GO matchmaking system considers your overall behavior on Steam
Valve has rolled out a new Counter-Strike: Global Offensive matchmaking system that expands on the Prime Matchmaking system it launched last year. Called Trust, the new system takes a more holistic approach to connecting players than Prime by taking into account a much wider range of factors, including some drawn from outside of CS: Prime Matchmaking requires that players link their accounts to their mobile devices and have a minimum CS: GO rank of 21, to help ensure a reasonably consistent level of skill and commitment between connected players.
At this time we are not providing the list of factors used in the Trust Factor matchmaking system. GO or other games on Steam. Additionally, Trust Factor matchmaking will get continuous updates, and any list of factors would become outdated very quickly. In general, Trust Factor is determined by looking at a user's past experience in CS: GO and on Steam to ensure the system is as accurate as possible.