What does “One can easily give it a miss” mean?

The expression "give something a miss" means to intentionally avoid something.

It is the opposite of:

Give it a go

or

Give it a try

which means to try something.

Hey, I just downloaded a new game for my phone! It's free; you should give it a go!

No, I think I'll give it a miss. I hate those freemium games.

You should be aware that, in your example, both the use of "one" as a pronoun and the expression "give it a miss" are strongly suggestive of British English. This expression is, in my experience, much less common in American English. An American English speaker would be more likely to say:

You can easily take a pass.

The meaning of "take a pass" is the same; to decline or avoid something.