A Product Key/License Key is a unique combination of letters and numbers that activates a software product. It serves as a digital identifier that verifies the authenticity of the purchased software and authorizes its use.

When you purchase software, you will receive a Product Key/License Key that you will need to enter during the installation process to register and activate the software. Without a valid Product Key/License Key, you will not be able to use the software beyond its trial period or limited functionality.

It's important to keep your Product Key/License Key safe and secure, as it is a valuable asset that proves you own a legitimate copy of the software. If you lose your Product Key/License Key, you may not be able to reinstall or reactivate the software.

In summary, a Product Key/License Key is a crucial component of software activation and ownership, allowing you to access the full functionality of the software you have purchased.