Including irrelevant content in your email campaigns can lead to several issues: - Decreased Engagement: Subscribers are less likely to open, read, or click through your emails if the content doesn't appeal to them. - Increased Unsubscribes: When recipients frequently receive irrelevant emails, they are more likely to unsubscribe from your mailing list. - Higher Spam Complaints: Irrelevant content can prompt recipients to mark your emails as spam, which can damage your sender reputation and deliverability. - Wasted Resources: Creating and sending emails with irrelevant content consumes time and resources that could be better spent on more targeted campaigns.