You should always add puncuation, capitals, spacing and detail. If there is no puncuation it will just be a long sentence. If there is no capitals it will all be a lower case sentence. If there is no spaces it will all be a smused up sentence . If there is no etail how would it be interesting to see.

You will know when to stop at a post when you see that they have good information relating to the question. When you see that you they have good grammer. When you have period.

You canfind great post buy looking at he post and seeing if it follows your criteria of a great post. If it is not a great post then you will know.