MacBook battery: Is it safe to use while plugged in?

Using while plugged in or not ?

I transferred from windows to Mac just a while ago so I am still not used to MacBook built and functions. With windows, I have to plug it in at all times but I do not feel worried but with Mac , I just am not sure whether if that is fine or not .

My device is MacBook Neo and it has been just 3 weeks since purchasing.

I have searched about this exact question but I have seen both types of comment - 20/80 and plug in.

I would like to know which usage is much more suitable for the MacBook and if using it while plugged in is alright?

And anything about whether I should still plug it in when the battery is at 100%

Thank you !!!!