Put (someone or something) to bed verb phrase
The bed is the flat portion of an old-style printing press that houses the type. When writers refer to "putting a newspaper or magazine to bed," they're referring to the final edits before publication.
To help someone prepare to get into bed, especially kids
After putting his daughter to bed, he walked out and closed the door slightly.
To finish something or some first preparatory steps
I had been working on my computer all night to put this project to bed.
To stop discussing, considering, or focusing on something
I couldn't put what she said to bed.
Can you guys put the issue to bed? The answer is apparent on the board.
To finish or complete something in a satisfactory way
To finish the last few minor details of a project, assignment or report so that the task is completely done
To get some sleep
If you put/add the finishing touch(es) to something, you do the last detail(s) that make it complete.
The verb "put" must be conjugated according to its tense.,
The origin of this phrase is not clear.