WhatsApp Web is a browser-based PC client of WhatsApp messenger. It allows users to send and receive WhatsApp messages online on their desktop PC or tablet. WhatsApp Web is not a separate account, but rather a mirror of the users WhatsApp account on their phone.

There are also third-party apps available, such as Web Messenger for WhatsApp Web, which allow users to access WhatsApp Web on their mobile devices. Dual Web is another app that allows users to access some developer features, such as changing headers and cookies sent to websites with each request, and managing browser storage functionality.

It is worth noting that some users have reported issues with using WhatsApp Web on certain browsers, such as Microsoft Edge. In such cases, updating the browser or clearing the cache may help resolve the issue.