enhancement
n. C / U B2 Upper Intermediate US //ɛnˈhænsmənt// UK //ɛnhˈɑːnsmənt// en·hance·ment
n. an improvement that makes something better, more beautiful, or more useful.
n. the process or result of increasing or improving the quality, value, or extent of something.
The new software update includes several security enhancements.
The chef added a pinch of saffron for flavor enhancement and a vibrant yellow color.
While the digital enhancement of the photograph made the details clearer, some critics argued that the process stripped away the authentic grain of the original film.
Usage
Uncountable when referring to the general process of improving; countable when referring to specific features or changes.