When users search for they are usually looking for two things:

It often hosts older sequels and cult classics that might not be readily available on mainstream streaming platforms in specific regions. The "Verified" Search: Why It Matters

On sites like ISaidub, a "verified" tag usually implies that the community or the uploaders have tested the audio-video sync and confirmed the file quality (often 720p or HDRip). About Son of the Mask (2005)

Most files are optimized for mobile viewing (MP4/MKV) with smaller file sizes.