What is Maf

[2003v5]

Hi this may sound silly but what is MAF,
Reading some of the faults other people have on the car sound similar to mine so just wondering what it is and if it is worth changing.
Thank you.

 

[Damoegan]

Mass Air Flow meter.

 

[2003v5]

ok

Thank you for the help.
feel silly now you said, i should have known that lol