to investigate; to try to get information about (something); to try to discover the facts about something such as a problem or a crime
Investigators are looking into the cause of the accident.
The police checked into her story.
Is there a problem? I could look into it.
I’ll have to look into that matter.
Don’t worry about your problem. I’ll see into it.
I wrote a letter of complaint, and the airline have promised to look into the matter.