besides paypal verified i am seeing a number (1).Before the number was 1 and now it is 3.what it is actually?
It is the sellers reputation The Seller Reputation Number measures how many Verified PayPal members have paid that seller. New transactions are added 30 days after they occur, to ensure that the Reputation Number reflects successful exchanges. Read the FAQ of paypal and you will get anaswer to all your questions
It's basically the number of transaction from other verified members into your account. Main purpose of this is to show how reputable a PayPal account holder is and it updates every 30 days (as said above) so you don't have to worry about that