SSL (Secure Sockets Layer) is the standard security technology for establishing an encrypted link between a web server and a browser. This link ensures that all data passed between the web server and browser remains private.
New/Mode's campaign experts highly, strongly, fiercely recommend that you embed your campaign tools on SSL protected pages, which means pages with an address beginning in https.
Why use HTTPS
HTTPS helps prevent intruders from tampering with the communications between your websites and your supporters’ browsers. Intruders include intentionally malicious attackers, and legitimate but intrusive companies, such as ISPs or hotels that inject ads into pages.