Question

what is customize define the customize
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Answer 1

ustomize; 3rd person present: customizes; past tense: customized; past participle: customized; gerund or present participle: customizing; verb: customise; 3rd person present: customises; past tense: customised; past participle: customised; gerund or present participle: customising

modify (something) to suit a particular individual or task.

"the software can be customized to the developing needs of your students

Answer 2

to modify or build according to individual or personal specifications or preference:

to customize an automobile.