Let's hear it for....

[chitchit]

I often see this expression as a propaganda. Can u give me its meaning? Thank u.

[riverkid]

I often see this expression as a propaganda. Can u give me its meaning? Thank u.

It means the same as,

"Let's give a big round of applause for {____}".

It is an encouragement for an audience to clap, yell and scream for somebody for some reason.