How long should a practice block be?

Many players use 10 to 20 minute blocks per exercise, with a short break between them.

Does the timer keep running if I switch tabs?

Yes. It keeps counting while the page is open.

Practice in focused blocks. Set a countdown for each exercise, or run a stopwatch to see how long you've been at it.

Choose Timer or Stopwatch.
For a countdown, pick a length and press start.
Give the block a label, like "Alternate picking", so you know what you're working on.
A chime plays when the time is up. Turn it off in settings.

How long should a practice block be?: Many players use 10 to 20 minute blocks per exercise, with a short break between them.
Does the timer keep running if I switch tabs?: Yes. It keeps counting while the page is open.

A bench keeps the timer next to your metronome and notes, so one screen runs the whole practice session.