verb (used with object), cus·tom·ized, cus·tom·iz·ing. to modify or build according to individual or personal specifications or preference: to customize an automobile.

Is Customise a real word?

“Customise.” Merriam-Webster.com Dictionary, Merriam-Webster, Accessed 11 Oct. 2021.

Which is correct customization or Customisation?

As nouns the difference between customisation and customization. is that customisation is while customization is the act of customizing something.