The SOAP Tool allows one to invoke webservice for integration purpose to return useful information from external sources into the process instance.
Figure 1: SOAP Tool Properties - Configure SOAP Tool
Figure 2: SOAP Tool Properties - Store to Form
Figure 3: SOAP Tool Properties - Store to Workflow Variable
Figure 4: SOAP Tool Properties - Advanced
In the example above, we are making a webservice call to http://www.webservicex.net/geoipservice.asmx, calling the method GetGeoIP.