Steem Power ? But How ?

Hello Steemers!

I wanted to know that if there is any way by which I can increase steem power for free. How do you guys get steem power which is also called "SP"? Do tell me guys because I am highly interested in increasing my Steem Power. Also if you can transfer a little bit of steem power then also it will be helpful for me. And guys I would love to listen your opinion, whether to increase or not the Steem Power. Do help me. I am waiting.