Installing fonts in Windows
Right-click on the font and choose Install. Or, you can open the font in the default Windows font viewer and click the Install button
or you can Drag and drop (or copy and paste) the font file to the folder C:\Windows\Fonts
Installing fonts on a Mac
Installing fonts in Linux
Font formats
OpenType (otf)
TrueType (ttf)
Web Open Font Format (WOFF/WOFF2)