Checker Plus for Gmail is a Chrome extension designed to enhance email management by providing real-time notifications for new messages directly in the browser. This extension eliminates the need to keep Gmail open in a separate tab, allowing users to read, respond, and manage emails efficiently. It offers features such as message reading, deletion, and customizable folder notifications, enabling users to filter out less important emails like those from the Promotions folder.

The tool supports multiple email accounts and recognizes inboxes associated with addresses open in the browser. Emails can be managed through a pop-up preview window, allowing actions like archiving or deleting without disrupting the current browsing session. Additionally, Checker Plus for Gmail includes sound notifications, customizable to play specific sounds or read aloud incoming messages, making it a practical solution for users who need to stay updated while multitasking.