Google Search Console (previously Google Webmaster Tools) is a no-charge web service by Google for webmasters. It allows webmasters to check indexing status and optimize visibility of their websites.

1. How to submit sitemap.xml url of your website to webmaster tool?
1)Go to the url
https://www.google.com/webmaster/tools/
Enter your login details .

2. 2) Click on Search Console you will get following screen

3. 3) Enter the url of your website and click on add a property :

4. After adding the property you will get the following screen, follow the
four steps in which
i) We have to download the html verification file given by Google

5. ii) After downloading the verification file ,it has to be uploaded to the server:

6. iii) Check whether the Google verification file is uploaded on the server

7. iv) Then after verifying the whole process you will get the
following screen

8. 4) Click on search console again you will get a preview
of your website. Then click on view details :

9. 5) Click on Submit a sitemap

10. 6) Click on ADD/Test Sitemap button

11. 7) Then add the name of your sitemap file after the suggested
url as sitemap.xml and click on submit

12. 8) Click on refresh

13. 9) Your sitemap.xml file is uploaded and you will get to
see the details of the number of web pages you have
submitted