Generic datasheet PDF of roughly one megabyte; the name carries no part number or manufacturer, so the component it covers is only visible once the document is opened. Datasheets like this describe pin functions, package dimensions, recommended operating conditions and typical application circuits, which helps when checking a chip against expected voltages or finding a compatible replacement. Open it in any PDF reader and confirm the marking printed on your component matches the part on the first page before relying on the figures.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ic_mosfet_pdf_datasheets. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.