What is it? Where does it go? Do I need it?

[Brushpile]

Sorry for the dumb question.
Bought a used MS250. Was cleaning it. During,I moved the saw from one truck bed to the other. Found this where the saw was. I don't know what to do with it

 

[trains]

its called a baffle plate, goes behind the air filter in the top cover/ housing plastic when the air filter cover is removed, it just slots in.

edited to add
yes you need it, well you dont, but the saw does.

 

[Brushpile]

10-4 Thank you sir.

 

[heimannm]

I think you can also flip it over to leave that space open to allow some warm air into the filter compartment when cutting in colder weather.

At least other Stihl models normally have a summer/winter shutter setting.

Mark