A spam score checker is a tool used to analyze the likelihood of an email or message being marked as spam by email filters. It evaluates various factors such as the content, subject line, and sender’s reputation to determine the probability of the message being flagged as spam. This helps individuals and businesses ensure that their emails reach the intended recipients’ inboxes and avoid being marked as spam. By using a spam score checker, one can improve the deliverability and effectiveness of their email marketing campaigns and communication efforts.