Please tell free technique/tools?

Google advertising

Unfortunately, many of these sites do this after placing a link, and I am not able to get backlinks from them for my website.

In a week time you might sense if there is any problem in indexing. For more information, https://support.google.com/webmasters/answer/7474347?hl=en

Thankyou. Can you please tell me how long does it take for Google to index a site?

I am seeing it already crawled, http://webcache.googleusercontent.com/search?client=firefox-b-d&q=cache%3Ahttps%3A%2F%2Fdiscoveryhomes.in

Just use the on-page and off-page SEO with best of your knowledge. You can follow your competitor to enrich your efforts on the way of applying the SEO.

You should ignore such sites and move ahead for other social bookmarking sites. There are many social bookmarking sites are already available which work smoothly. There m...

Yes, it looks so. I have just checked it again now and found Google has removed this feature from the search settings.

No, i don't think.