PNG Metadata Explained
PNGs don't use EXIF in the same way as JPGs, but they store "Text Chunks" (tEXt, zTXt, iTXt). These can contain the software used (e.g., "Adobe Photoshop"), copyright info, and creation timestamps.
Clean PNGs for the Web
For web developers and designers, removing these chunks can slightly reduce file size and, more importantly, remove unnecessary fingerprints from your assets.