For years Web publishers using Adsense have been unable to display advertisements on secure pages (HTTPS).
That's no longer the case as Google this week announced that they have updated the Adsense ad code so that it now supports secure ad serving through Secure Sockets Layer (SSL) on HTTPS web pages.
Essentially, publishers with secure sites, mostly ecommerce and social networks sites, or any site really that protects the sensitive information (credit card, login credentials) of its users can use Adsense to serve SSL-compliant ads.
In the past if a publisher tried to display Adsense on secure pages, their users would be shown what is known as a mixed content warning. That was less than optimal of course, so this improvement will likely be well received.
Below are some examples of "mixed content warnings"
Digital marketing executive with proven experience in all aspects of search engine optimization (SEO), performance-based advertising, consumer-generated/social media, email marketing, lead generation, Web design, usability, and analytics. - 20-year Internet marketing veteran, currently serving as the Digital Marketing Campaign Manager at Antenna Group (formerly Chicago Digital). - Former Editor-In-Chief of Website Magazine, and a regular speaker on Web technology digital marketing strategy - Author of several books on digital marketing Including Web 360: The Fundamentals of Web Success; Affiliate 360: The Fundamentals of Performance Marketing; Domains 360: The Fundamentals of Buying & Selling Domain Names, and SEO 360: The Fundamentals of Search Engine Optimization.