Do at least a quick reading of what users above you have replied and try to stay on topic.
As long as you spare a few minutes of your time trying to understand what the topic is about and coming up with a proper answer, you should be fine.
I have mainly focused on this, and I'm equipped a little bit, little developments is observed from my writings, above users comments are beneficial, observe case.
There are only a few reasons why some of our posts are deleted.
*spam
*unsubstantial
*not-contributing the discussion
Exactly as I thinked, my posts had been comprises of all these, I'm getting better off now. Constant reading and active here made me better.