how does a bot works ? Concurrently or queued fashion ?

Hi,

I am in the process of testing a workaround for sequential keys/ Serial number for mulituser application . I want to know how the bot works when 3 or more users initiates a bots at the same time . ( Bot a triggered in an add event of a table).

Note : It is single bot , which is triggered by each user. which has the same functionalities. in image I have described as Bot 1,2,3 it is just of understanding purpose which user has initiated it.

Does it act concurrently ?