Is there any tool to know that google has banned our blog, so that we know the reason why it has banned?
Can anyone explain how that tool works? What is the criteria it's measuring? Further more , is it possible to be banned for one search phrase alone. And what constitutes a ban? I once went right off the serps for just the single phrase real estate and yet all my other rankings remained unscathed.
You can also check it manually. You can type the url of your blog in the search box and if it's not listed on the serp, then IMO, it's banned...
Use Google Webmaster Tools and submit an XML Sitemap. If your site is banned or there are any issues with your site, Google will let you know through Webmaster Tools. google.com/webmasters/tools/ You can not be banned for certain search terms, your site is just deemed less relevant for that term.
you just check by using site:yourblogname.com. If it shows 0 result and the blog is old and the page rank is grey means it is banned by google.