How can you optimize the website which has millions of pages?

Ranking and SEO of any website depends on several factors. A website with lots of pages means a lots of links for users as well search engine. Website having millions of page is not a guarantee to rank on top of search result. Ranking of a website depends on several Search Engine Optimization factor. Millions of pages on website needed to be optimized well to rank in search engine result. Generally a website consist of fixed amount of pages where as larger sites like Amazon or news or sports blog have multiple pages and are much larger in size. Larger sites can rank faster compare to smaller website if optimized efficiently.