In this day and age, one would think that every retailer has a strong and skillful online presence. But that is not the case, according to a report recently released by 24/7 Wall Street that shows why Amazon is the king of online sales.

A lot of the major retailers still don't get it, says the analysis, which looked at revenue numbers versus Web traffic. The lower the Web traffic compared to overall sales, the more poorly a company does in promoting its items on the Internet, the study reasons.

Some of the companies were not surprising, such as Home Depot and Lowe's. After all, not many people think of getting on the computer to go shopping for lumber. Walmart, however, surprisingly isn't doing a very good job, and ranked as the 4th-worst online brick-and-mortar retailer.