This technique is often used in email marketing to track the effectiveness of campaigns. Marketers can see how many people opened the email, how many clicked on links, and how long they spent reading the content.
The core logic behind using invisible images is simple: when the email is opened, the image is requested from a server, logging the event as an "open" and providing valuable metrics on email interaction.
Such tracking can be implemented with server-side programming languages like PHP, Python, Java, or Node.js. It involves embedding an image in the email, and when the image is loaded, the server logs the request. This data can then be processed to track open rates and other user behaviors.
Go to MaiPDF QR Maker PDF to QR Image to QR Share PDF Online ReadNotify Share PDF OnlineGrabify.icu offers a simple tool that lets you embed invisible tracking images in emails, so you can receive notifications when the recipient opens your email.