When Site has is targeting many countries and it has different version of the home page depending upon the geo location.
At that time it is very helpful to use hreflang tag to tell the google to show which version for particular area.
It is different from canonical tag and but helps the site to be crawl by search engine with in local search engines.
Hreflang can be implemented in 3 ways.
1)Head element in web page(for the page level)
2)Http Header(Use when page is not in Html)
3)Sitemap(use when the site has large number of pages)
If your site is multi-regional and multilingual , then you should mention the hreflang tag with respected language with country name in the source page.
So that it is easy crawled by google and shown in the search engine of particular region with respected language.
According to the some of the case studys, it have impact on the use of hreflang tag in the site.
It works by page by page, but not whole on the site.
For more clarificatoin you can check here. Use of Hreflang Tags
Case study of hreflang
At that time it is very helpful to use hreflang tag to tell the google to show which version for particular area.
It is different from canonical tag and but helps the site to be crawl by search engine with in local search engines.
Hreflang can be implemented in 3 ways.
1)Head element in web page(for the page level)
2)Http Header(Use when page is not in Html)
3)Sitemap(use when the site has large number of pages)
If your site is multi-regional and multilingual , then you should mention the hreflang tag with respected language with country name in the source page.
So that it is easy crawled by google and shown in the search engine of particular region with respected language.
According to the some of the case studys, it have impact on the use of hreflang tag in the site.
It works by page by page, but not whole on the site.
For more clarificatoin you can check here. Use of Hreflang Tags
Case study of hreflang
