Your questions up until now have required you to acquire some knowledge to answer them but this is really one that you ought to be able to workout for yourself.
If, say, you want to get rid of your tablet and replace it with a mobile phone, you might have to spend a very long time searching to find someone who
(a) has got the type of phone you want ; and
(b) just happens to need the exact model of tablet that you no longer need.
Further, if one item is worth more than the other, one of you will have to find something else to offer as 'change' in the deal. It's a hell of a lot easier if you can simply sell your tablet for money and then put that money towards buying the phone you want.
i.e. bartering goods is incredibly impractical in a modern society.
However the bartering of
skills and services is alive and well and, indeed, is becoming increasingly popular these days:
https://www.forbes.com/sites/learnvest/2015/07/20/bartering-in-the-modern-day-how-people-are-swapping-skills-and-services-for-free/#49d7162a17ed