Web marketing involves many strategies and the toughest rivalry exists between PPC and SEO. In case you work on one of the two web sectors you know what we are discussing here. One is not better than the other; it is just how well PPC or SEO serves the real purpose and works hard to gain revenues for the companies.

n case you have ‘page not found’ error rel canonical will allow indexing of the page during repairs or redesigning of web pages. Search engines following a heuristic approach to find the canonical in case of a 404 error. You should follow the rules as you use rel canonical for relative paths and search engine processes your website in a regular format.