What is Speaking in Tongues

You know what I’ve been praying to God that He will give me a spiritual gift, a gift in speaking in the tongue because It’s my weakness, I don’t have enough courage to talk to other people. I am introvert person.
But after watching this video I realized that I don’t need to ask God for that because God has a bigger plan for me, whatever gifts he will give to me. I am happy to accept those gifts.