Is it true that some treats work better than others when training a dog?

I’ve made progress with my dog training this evening. I got him to lay down. Twice. And he is finally going outside when I tell him to instead of pouncing on me. Yes!

Anyways, I’ve read (or maybe seen on a show) once that strips of meat work better when training a dog than biscuits. Is this true?

Thanks in advance!

Progress! !!!
Thank you all very, very much! I’ll definitely take these with me next time that I go to town!