What is cananicalization code? where can i implement that code I have some doubt this particulate area please give more and more details
I think you mean "canonicalization" ... here's an example: Suppose you have an ecommerce Web site that sells bicycles. Occasionally, you might have products that end up in different categories. Let's suppose you sell a women's mountain bike ... you could have the product appear in the "women's bikes" category and also in the "mountain bikes" category. The product could also appear on its own non-category-specific page. If that were the case you could end up with multiple URLs for that product. It might be found in any of the following 3 places: yourdomain.com/womens-bikes/this-example-product.html yourdomain.com/mountain-bikes/this-example-product.html yourdomain.com/this-example-product.html In this case, your site could be viewed as having duplicate content ... all three pages exactly (or nearly exactly) the same. This is bad. Fortunately, you can add a tag to the header of each of those pages that tells the search engine which of the three pages lives at the preferred URL. This tag is called a rel="canonical" tag. In the example I listed above, you might decide that yourdomain.com/this-example-product.html is your preferred version of that page and you'd like to search engine's to know that the other pages are simply duplicates of it. So, you go to the other 2 pages and put the following in the head section. <link rel='canonical' href='http://yourdomain.com/this-example-product.html' /> Code (markup): Once you've done this, you shouldn't receive duplicate content penalties because you've let the search engines know which page they should care about most. Please let me know if you have other questions about the topic.
Hey You will find more information on cananicalization code. Then you can visit Google webmaster offical Blog http://googlewebmastercentral.blogspot.com/2013/04/5-common-mistakes-with-relcanonical.html