Why wrote in gmail pfa

I think you meant to ask "Why does Gmail have a 'PFA' in the compose window?"

In Gmail, "PFA" stands for "Please Find Attached". It's a pre-filled text that appears in the compose window when you attach a file to an email. This is a common phrase used in business and professional communication to politely request the recipient to review the attached file.

Gmail includes this phrase as a convenience to help users quickly and efficiently compose emails that require attaching files. By including "PFA" in the compose window, Gmail is suggesting that you use this phrase to acknowledge the attachment and make it clear to the recipient what they should do with the attached file.

So, the next time you see "PFA" in the Gmail compose window, you know it's just a helpful suggestion to make your email writing a bit more efficient and professional!