The Internet and other digital technology offer new opportunities and threats, so creating a SWOT specific to the Internet is important to help meet this challenge.
But your Internet SWOT shouldn't consider online channels in isolation - customers have a choice of multiple channels, so the SWOT should consider how the Internet presence of a company integrates with the offline world - customers often need and want to contact a company by phone, callback and companies still need to use offline communications like print, direct mail and TV in many cases.
Here is an example from my Digital Marketing: Strategy, Implementation and Practice book showing some of the typical activities that need to be managed such as visibility on partner sites, how to target new customers or improve their experience on your own site.