The default number of devices that can be logged in simultaneously is 3. Here is a real-life scenario:
- Bob logs in to watch the concert on his desktop computer
- Bob walks away and decides to log in on his phone as well
- Bob's sister logs in with Bob's email address on her phone
In the above scenario, Bob has reached the device limitation. If Bob shares his account with his mother, his mother will receive a "too many connected devices" message and be asked to remove a device before joining.