Here is some general advice. Hope this helps;
If you look at people taking GRE exams, then mostly they put 400-750 words in 30 minutes. While IELTS test takers have 40 minutes for task 2, the number of words I suggest is between 300-350 words. This means that you will have in-depth discussion with more words in IELTS task 2. However, this must be written in a clear and logical way, called coherent. Also, you should present grammatical and spelling errors-free.
Let's say:
they might aware
they might
BE aware
encouner
encounter
dailt
daily
people are gradually not responsive
people are not gradually responsive
in comparison of
in comparison to/with
drawback
drawbacks
adversly
adversely
the society become
the society become
Sa living,which impact
a living,which impact
Scan not
cannot
#bodies
Each body should have a clear example. This can be your supporting details
#conclusion
After a concluding signal, make sure you have a summary of main points of this essay. Then, the next sentence should be thesis statement which is restated with different words. If you could, then add a final comment about the main idea of this essay. This is the importance of a conclusion :D