Optional Lab Coding

Hi there, I just have a question that do we have to go through every optional labs in detail?
Because I found some optional labs are interesting to go through but some is not.

It’s really up to you how you arrange your time. You might spend more time on labs that you are interested in, and less time on the others but come back later if needed. There is no required work in optional labs so you might choose to go through them anytime.

Raymond