Number of indexed pages with "site:" search less than reported in Google Webmaster Tools (1100 in site: search, 21000 in Webmaster). How to fix it?

My competitor studiobrave.com.au is ranking for keywords without have any sort of relevant content on the website. How is this possible? I have checked through tools like...

The domain authority of my client site snaptubemodapk.org has not changed for a few months; even got some high-quality links from authority sites, and Moz has not crawled...

The schema of my website despite doing proper internal linking has not been picked by google. The schema validator is not showing any error. Its been almost a year. What...

We have several URLs in the page section with the error 'Crawled - currently not indexed.' These URLs do not exist, and I have no idea how Google bots are crawling them....