Any address can be tracked easily. But the owner of address is anonymous. At some extent it is still anonymous. We can generate as many addresses as we can to receive BTC instantly with no one knowing the owner.
Yeah that's part of the pseudonymous nature of BTC. One doesn't know for sure who's the owner of a specific address. But even if you figure that out, one can pretty easily just use another address and thus remain separate from the first one!
Using multiple adresses and shared sends and mixers does remove that.
could you give more info about this? are there some software for "shared sends and mixers" or i need to do it by myself?
Shared send is a feature on blockchain.info's wallet that allows you to send coins to another address but it will go through several intermediary addresses first and each transaction to each intermediary address has several input and output addresses
Here is also bitmixer method:
BitMixer has a huge reserve of Bitcoins already in its system. A user sends us their BTC and we cap it onto the end of our reserve chain. We then pay the amount of what was purchased from the beginning of our reserve. This method of mixing means that you do not have to wait for other customers coins already mixed are instantly available.