singing on pitch

What does singing on pitch mean?  Doesn't it mean not singing flat or sharp, and if so what are the best excerises that i can do to get better with singing on pitch?  I've been working on my agilty and strecthing my chest voice and ive been seeing improvment, but i'm still having trouble singing on pitch with my head voice.

That's correct: singing "in tune" or "on pitch" means singing the desired/correct pitch without being too high (sharp) or too low (flat). 

If you haven't already, check out our tutorials on improving your intonation:

https://www.30daysinger.com/tutorial/key-to-perfect-pitch-and-intonation/1

https://www.30daysinger.com/tutorial/pitch-and-intonation/1

https://www.30daysinger.com/tutorial/practice-routine-for-better-intonation-singers-who-struggle-with-pitch/1

I also recommed using the apps and resources below - focusing specifically on your head voice range:

Free sites: 

Online keyboard - https://www.harpkit.com/online-tuner

Chromatic tuner - https://tuner.ninja/

Free apps for both iPhone + android:

Pitched Tuner - https://stonekick.com/tuner.html

SingSharp - https://www.singsharpapp.com/

iPhone only:

PerfectPitch - https://apps.apple.com/us/app/learn-to-sing-perfect-pitch/id1409450884