The Particle Electron is a powerful Internet of Things building block that can be used to send SMSes and MMSes with Twilio's Messaging APIs. To get started, users need to sign up for a Twilio account, find or purchase an SMS-capable number, retrieve their Twilio credentials, prepare their Particle Electron for flashing, and set up a webhook in the Particle console. The process involves using the Particle Web IDE to copy and paste code, which can be used to send SMSes and MMSes with custom data, including images. Users can then power cycle or reflash their Electron to test the integration, and monitor sensor readings or other applications that require messaging capabilities.