I have a website sports blog over 12 years old, its in google news and I added those social share plug in from Jet Pack where new articles are shared on your social media pages automatically
so I have a social media page for my website on facebook and twitter
I typed my website name in search and my website is number three position with my facebook and twitter right above on the top
when I add .com to the end of my site name my website appears on the top but with no sitelinks.
I was told that I should index categories to get sitelinks, I use genesis theme on wordpress and just put no index categories and tags.
But someone suggested to index categories and that it wont cause a duplicate content penalty.