Online measurement firm comScore is out with its top 50 web properties report and Walmart.com must be doing something right, judging from a surge in traffic.

Walmart.com was ranked 24th on the top 50 list for May, with 42.4 million unique visitors, a 9% increase from the prior month when comScore showed Walmart.com had 38.8 million unique visitors in April. The gain in web traffic over the same month the prior year is even more substantial, as Walmart.com registered a 26.2% increase from a May 2011 unique visitor total of 33.6 million.

As for Amazon.com, the company Walmart.com is continually measured against, it continues to attract more than double the number of unique monthly visitors as Walmart.com, but its traffic situation looks very different. For starters, comScore shows May traffic at Amazon.com registered 99.4 million visitors, down from 101 million visitors in April. When compared with the same month the prior year, Amazon.com’s unique monthly visitor total increased a modest 4.7% rate, according to comScore data.

Source: retailingtoday.com