Following videos have explanation of what is Vlookup, how to use Vlookup in excel, libreoffice. Understanding Vlookup function saves a lot of time when you are handling large amount of data.
Excel Lookup is a must skill for every Excel user. Vlookup concept remains same in google sheets as well. Lookup function excel must be learnt by every beginner as then you will be able to save a lot of manual work early on and would be able to build skills in building vlookup with different contexts.