The inbox placement rate refers to the percentage of emails that successfully land in a recipient’s inbox rather than being filtered into spam or junk folders. It is a crucial metric for email marketers, as a high inbox placement rate ensures that their messages are seen and read by their intended audience. A low inbox placement rate can negatively impact the success of email campaigns, as it reduces the chances of the email being opened and read. Therefore, maintaining a high inbox placement rate is essential for effective email marketing.