Why My website not index in Google?

I need to know why my website not get indexing.
• Because you suck at SEO
• Because you suck at WordPress
• Because you’re running an outdated version of WordPress
• Because you don’t have enough links pointing at your website
• Because you don’t have enough content on your website
• Because you don’t have a clear call to action on your website
• Something else… Please describe below.