Also known as a sender policy framework record, it is a type of DNS TXT entry or resource record that contains a list of the IP addresses allowed to send an email on behalf of your domain.
Since SPF is a standard email authentication method used to certify the sender of an email, adding an SPF record can help detect and prevent spammers from sending emails with forged From addresses on your domain, helping to protect senders and recipients from spam, spoofing, and phishing.
SPF increases domain reputation and email deliverability.