"Usability tweaks" refers to small adjustments or modifications made to improve the ease of use or user-friendliness of something, such as a website, app, or product. Full definition
With a few usability tweaks, four out of 10 visitors to the firm's mobile website now chose to call the firm directly from their devices. (lawyermarketing.com)
invisible usability tweaks, like the iPad's «phantom keys» when you use the... more» (stemlegal.com)
CUE is one of my favourite infotainment units and it's upgraded for 2016 with a faster processer and a few minor usability tweaks, making it better than ever. (autofocus.ca)