Which suitable and handy method should be used to track remote employees?

What do you want to track apart from the routine work that you automatically get updated

I dont think there should be any tracking.

Hire someone whom you trust
Track by output not velocity.
Let the creativity flow.

I believe track sounds like big brother. I believe in outcomes, quality and timeliness. Assign clear tasks to the team - currently using MS-Planner and trying to move into monday.com in coming weeks. Primary purpose of the technology is to ensure everyone is aware of their role in the team and what we are collectively wanting to achieve. The location of where employee is performing the task (within office or home) should matter less. Staff can be in office and still under performing and vice versa. Leadership should think about quality outcomes and progression of organisational objectives. 

Teams

Held Polls in between sessions for live audience which is time bounded