Key
During is a preposition and it's always followed by a noun.
While is a linking word and it's always followed by a clause.
- during
She usually watches TV during lunch.
You should take notes during the conference.
We went to the theatre during our stay in Paris.
- while
She usually watches TV while she's having lunch.
Joe invited his friends home while his parents were on holiday.
Your sister called you while you were at work.
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