Why We add Google Webmaster and Google Analytic in our website?

THANKS TO EVERYONE...........:) FOR SHARING YOUR VIEWS

Google Webmaster: It helps in giving information about:
1. Internal link of the Site
2.External Links of the Site
3.Search Query Keywords
4.Malware Error
5.Sitemap Error
6.Crawl Error ie 404 Errors
7.To increase crawl rate
and many more
Now about Google Analytic:
1.Traffic form different Countries to you site.
2.Bounce rate
3.Form which system, browser, window you site has been accssed
4.New Visitors
5.Traffic rate
and many more

You can also request the removal of malware warnings via webmaster tools much faster.

Google Analytic and Webmaster are sole for website through which you will manage your site.
Both tool are free.
Both tool belong to Google.

In Short It will help you to analyze your traffic and also make sure that your site comply with webmaster policies.

From analytic we can check all Website Information like traffic, referral Etc And Webmaster For any Correction in Site...

My SEO company create my account for analytic and webmaster.
We can easily update our sitemap in webmaster for crawlers easily fetching our site and other sites pages and Analytic, we easily identify our sites visitors.