Silence is golden. Here are 3 situations to examine. If you are on the "wrong" side of these, here is your big chance to change your ways.
The sign of an inexperienced player is the frivolous asking for explanations. If your opponents alert, that doesn't mean you have to do anything. After the auction is over, ask away. But, while the bidding is still underway, don't ask unless the information is vital to you.
On many auctions, you and your partner are passing throughout.