GA is an abbreviation for General Availability. This is when a software product is finally accessible to all its potential customers.
Software teams usually have a process for releasing new software, from a private beta [→], public beta [→] then general availability.
Most release structures have predefined conditions such as which customers are allowed during the release period and a tightly controlled feedback loop.
In contrast and in addition to opening up the software to everyone, general availability will typically have no predefined conditions or controlled environments and serves as the last type of release cycle.
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