meta description for my site is not being displayed when my site is googled

When someone searches for a website in google usually they see a meta description about their site with different cat egories and description about the categories too. I included the meta description in smartcrawl but no use. I tried with All in One SEO plugin also but I that doesn't work either. And my website is a multihosted site but still the categories wouldn't appear when someone google's it.
I have attached the screeshots of my site and another example site named 'alltechbuzz'. I want description to be added to my site just like that screenshot.
Can anyone please help me learn adding description to my site.