April 6 2014:  With a full page wrap around  advertisement in India's largest newspaper, The Times of India last week, Amazon reminded Indians that  2 months short of its first anniversary in June, the world's largest e-tailer  had already become the  largest online retailer here as well.  
In June 2013, Amazon  launched  its India site with just two categories. Ten months down the road,  their total  offerings  now stand at over 15 million products across 20 categories.  Amazon claims  to be the largest online store in several categories, including books, music, video games, toys, home and kitchen appliances, bags, luggage and fashion jewellery.
Amazon's closest competitors in India are  indigenous players, FlipKart who recently announced it had crossed $1 billion in  revenue and Snapdeal which is in sight of this target by year end.
In its Times ad., Amazon   reminded customers of its guaranteed  one day delivery options and the ease of returns. In a highly competitive arena, players like Flipkrat have been quick to offer similar facilities within days.

See Business Standard story : Amazon builds India business quietly