SOAP is an XML technology that programs can use to communicate with web services. A detailed discussion of how it works is beyond the scope of this help file but in its simplest form, it provides a mechanism for asking a remote computer for some information and getting the results back.
Channels can have a SOAP request file associated with them that will be sent to the channel URL using an HTTP POST (instead of the usual HTTP GET). The results will be sent back as a SOAP response which will typically be transformed using XSLT into a feed that Awasu can process.
One example of SOAP is installed with Awasu that queries Google's web service and allows you to monitor the results as a feed. Check the comments in GoogleSearch-SoapRequest.xml for details on how to set up a channel.
IMPORTANT: You must have MSXML 4.0 installed to use this feature.