Meaning of the word "drop in on" in English

What does "drop in on" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

drop in on

US /drɑːp ɪn ɑːn/
UK /drɒp ɪn ɒn/
"drop in on" picture

Phrasal Verb

to pay an informal or casual visit to someone, often without an appointment

Example:
I thought I'd drop in on you while I was in the neighborhood.
We used to drop in on our grandparents every Sunday.