The SPF record identifies which mail servers are permitted to send e-mail on behalf of your domain. It has a key role in preventing spammers from spoofing your domain.
The SPF record has the following look
Why do you need an SPF record?
With SPF record you protect your domain reputation in front of all other email services and other receiving email servers so to say. In simple words, you prove which senders are truly authorized to send emails from your domain.