Forums → Support Forum → Is it okay to say ok for a post?

Yeah, that's spam. Along with comments like "great game!", "10/10", "I liked it", etc. Just flag those posts, unless you see someone doing it a lot. Then you should contact a moderator.

Good posts are usually at least 7 words long, and tell something they liked, didn't like, or thought could be improved in the game.

What Green12324 said.

It's spam.

One word comments/posts are almost always spam. The occasional "yes" or "no" to a question that doesn't need anything more than that are pretty much the only exception (and these are considered spam if made in a thread asking something to everyone).

"Good game" and "bad game" and similar extra-short comments are also spam. Flag them.