Steemit Voting Power And Promotion - I Need Answers ?

• I have a few questions :

• 
  Source - steemit.com/steemit/@somethingsubtle/voting-power-and-steem-power-a-metaphor

• How the voting power works ?

• How can I regulate the percentage of my voting power?

• How much power does my voting power have if I have 1000SP - 3000SP Or more ?

• I'm thinking of investing in my voting power, I need good advice to know exactly what I'm doing.

Thanks in advance Hive account@dobartim