Many logos are Satanic. The circle surrounding a dot represents the Ouroboros serpent, the snake biting its own tail, surrounding the Earth, metaphor for total Satanic control. The most famous version is the Target logo, but the Google one is just the same.
Of course you have to separate the boasts of Satan from the reality. I have learned this the hard way. He will often claim more power than he really has ( he's a bit proud, as you may have heard ).
What does it mean for the man on the street? Not much. It probably means that someone high up at Google sold their soul to Satan for power and money and this is his way of showing adherence. Do you ever wonder why a company such as Google or Microsoft becomes all-powerful instead of any number of other companies that do roughly the same thing?
The reality of the world is that, a lot of guys are ugly and don't have much charisma and will do quite a bit to get the attention of ( gold-digging ) females... The motor behind all these cօռspιʀαcιҽs is quite basic, greed, lust, pride, the usual.