Percentage of emails that successfully reach the recipient’s inbox.

When recipients become overwhelmed by the volume of emails they receive.

Using software to automate email campaigns and workflows.

Methods used to verify the sender of an email and prevent spoofing.

Automated emails triggered by a user action (e.g., order confirmation).

Testing different versions of ads to see which performs best.

The process by which ad platforms determine which ads to show.

The written text in an advertisement.

The visual and textual elements of an ad.

Illegitimate activities that aim to generate fraudulent clicks or impressions on ads.