expression, noun, noun or participle which takes 'suru'
seeing and hearing; one's own experiences
Refers to things one has personally seen and heard, i.e., firsthand experience. Often used in the pattern 見たり聞いたりしたこと to mean 'things one has experienced'.
旅先で見たり聞いたりしたことを日記に書いた。
I wrote down in my diary what I saw and heard on my trip.
見
Some writers base their novels on their own experiences.