It combines "seeds" (people sharing the file) from multiple different websites into one view. This makes it much easier to find "dead" or rare movies because it looks in corners of the internet that a single site might miss.
While using Torrentz2, it's essential to take some safety precautions:
: Users often look for "Verified" tags within these search results to minimize the risk of downloading malware disguised as movie files. Essential Safety Practices for Torrenting