Information to recipient of the transaction I have some questions of the transactions bitcoin,

In a transaction bitcoin, there is not information on the recipient, right?

How do services such as blockchain.com track information about a transaction, from which wallets have they started and to which wallets have they arrived?
Block explorers know some information about wallets because they belong to public entities with known addresses. 

Other wallets are known because Bitcoin wallets typically follow a spending pattern where it's very easy to link together outputs and inputs belonging to the same wallet. 

For example: 


in most transactions all inputs belong to the same wallet
if a transaction has one output of 0.5 (or any other round number) BTC and one output of 0.158293 (or any other non-round number) it's likely that the second output is machine generated and belongs to the wallet of the sender