How can i align the vertex to a surface? first time writing here in stackexchange since most of the time i find the answer on other people's posts
I have a mesh made of a lot of vertex, i had do manualy remove and add some vertex after the surface was already made and now it looks kind of bumpy, it has smooth shading on and still
I want to align the vertex to the shape of the surface to smooth them, is there a way i can do this?

Thanks in advance!
1.) select all vertices in edit mode with your bumpy face
2.) then press this + button

3.) then tap S Z 0
4.) enjoy the flat surface
tutorial: https://youtu.be/4QJkM2Ve6qs (just be a little bit patient if it isn't uploaded, my upload speed is pretty slow)