What do you know about laptop batteries?

Is it better to charge it 100%, and then take the charger out and let it get low, then charge it 100% again, repeat?

Or is it better to charge to 100% and leave the charger in as much as possible, removing the charger only when you need to?

Or does it not matter? I mean ‘is it better’ as in the longevity of the battery.

More specifically, I have a Macbook (not the newest one).