Tamar Weinberg poses this theory after seeing a discussion about it on the High Rankings forums;
readers respond with various opinions on whether it's valid, and how to take the tracking further by adding click-to-call options, and other unique identifiers.
"I've seen an interesting solution where you can place JavaScript on your landing pages and depending on the referrer, it would display a different phone number," wrote one reader. In contrast, another reader says that it's better to get the consumers' contact info--by either using a "contact us via email" link or a submission form so that you can call them.