1. An automated method of tracking the effectiveness of viewing resources on electronic devices in causing transaction activity to subsequently occur at a physical location associated with the resources, the method comprising: (a) conducting web-browsing sessions with a plurality of electronic devices, each electronic device having a unique device identifier (UDID), wherein a plurality of resources are viewed during selected web-browsing sessions and a plurality of web-based transactions occur during selected web-browsing sessions, and wherein the electronic devices interact with a plurality of web servers and resource servers during the web-browsing sessions; (b) electronically capturing in a first memory a first set of data records communicated electronically via an electronic network to the first memory from one or more of the electronic devices, web servers and resource servers, each data record in the first set of data records including: (i) a uniform resource locator (URL) of a resource that was viewed by the electronic device during a web browsing session, (ii) one or more physical locations, each physical location representing a physical location of the merchant associated with the URL, (iii) a date/time that the resource was viewed by the electronic device, and (iv) payment instrument indicia regarding a payment instrument which has been used for completion of a previous web-based transaction by an electronic device having the same UDID that viewed the URL of the resource in step (b)(ii); (c) electronically capturing in a second memory a second set of data records communicated electronically via an electronic network to the second memory from one or more payment networks, each data record in the second set of data records including: (i) payment instrument indicia regarding a payment instrument which has been used for completion of a previous transaction at a physical location of a merchant, (ii) a physical location of the merchant, and (iii) a date/time that the previous transaction at the physical location of the merchant occurred; (d) electronically comparing in a processor in real time the first set of data records in the first memory with the second set of data records in the second memory; (e) based on the comparison in step (d), electronically identifying in real time using the processor any data records wherein a data record in the first set and a data record in the second set meet each of the following criterion: (i) the payment instrument indicia in the data record of the first set matches the payment instrument indicia in the data record of the second set, (ii) one of the physical locations in the data record of the first set matches the physical location in the data record of the second set, and (iii) the date/time in the data record of the first set is a predetermined amount of time prior to the date/time in the data record of the second set; (f) outputting report information in real time regarding any data records that meet each of the criterion, wherein the report information is usable for tracking the effectiveness of viewing resources on electronic devices in causing transaction activity to subsequently occur at physical locations associated with the resources; and (g) electronically communicating via an electronic network to respective merchants in real time when any data records are identified that meet each of the criterion, wherein steps (b)-(g) are performed without human activity.