Video series about VLOOKUP function in Google Sheets and various ways it can be applied. Other functions covered in these series: INDEX & MATCH, QUERY, IFERROR. If you need to jump to certain point, see below:

Merge Data Using VLOOKUP function:
https://www.youtube.com/watch?v=B8118U0z0_k

VLOOKUP is sorted (Approximate Match)
https://www.youtube.com/watch?v=AwOM3yzN3so

Organize Data Using VLOOKUP Function
https://www.youtube.com/watch?v=8hAn0G-tLWc

INDEX & MATCH Functions as VLOOKUP alternative
https://www.youtube.com/watch?v=-nqLkqXnAvg

Google Sheets
https://www.google.com/sheets/about/