Typically, a Lite ISO strips out:

Windows 11 24H2 is the most ambitious update to Microsoft’s operating system in years, integrating deep AI layers and the new Windows Display Driver Model (WDDM) 3.2. However, for users with older hardware or those who prioritize raw performance over bloatware, the standard installation is heavy and restrictive.

A "Lite" version is a custom-built ISO created by the community (or individual developers). It takes the official Windows 11 24H2 base and surgically removes components that are deemed unnecessary for the average power user.

Before you jump in, you need to know the trade-offs.