Boardview archive for the ASUS TUF FX505GT gaming laptop motherboard, revision 2.0, 390 KB in size. ASUS prints the model and revision on the PCB, and layouts can change between revisions, so check that it reads 2.0. Once extracted, the file opens in viewers such as FlexBV or OpenBoardView and shows component placement, net names and test points. That lets a technician follow power rails from the charging circuit to CPU and GPU regulators, locate the BIOS chip and track down shorted parts.
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 @BoardSchematic. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.