What Does TrueType Font (.TTF) Mean?

A TrueType font is a font standard and is the major type of font found in both Mac and Microsoft Windows operating systems. It consists of a single binary file which contains a number of tables related to printer and screen versions of the typeface. Developed by Apple and Microsoft, it gave font developers the much needed flexibility for control of the precise characteristics for font display.

Techopedia Explains TrueType Font (.TTF)

TrueType fonts come pre-installed in both Mac and Windows operating systems. Unlike other font formats, which use rasterization for hinting instructions, the hinting instructions reside in the font. This helps TrueType fonts to be faithfully reproduced right down to the pixels. It also has a far better control over the rasterization.