It happens with time. Post every day on your website and share. Ask all your friends to like you page. Add big social media buttons on your website. And it happens within a couple of months.
That is a tool, which shows us very important information about our website performance> index status, structured data, crawl errors, links from other sites and much more.
Google Sandbox is some kind of of Google penalty, which filters out backlinks to a penalized site which would otherwise have a positive impact on the site’s rankings in Google.
Twitter is without any doubt a good way to find and engage more people that would make traffic on your website. But you need to work every day on that.