H.R. 2331 requires all federal agencies that create or update a website intended for use by the public to ensure that the website is mobile friendly. A mobile friendly website is defined as a webpage easily navigated on a smartphone, tablet, or similar mobile device.
The summary below was written by the Congressional Research Service, which is a nonpartisan division of the Library of Congress, and was published on Nov 15, 2017.
Connected Government Act
(Sec. 2) This bill requires: (1) a federal agency that creates or redesigns a website intended for use by the public to ensure that the website is mobile friendly, and (2) the Office of Management and Budget to report on agency compliance.
"Mobile friendly" means that the website is configured in such a way that it may be navigated, viewed, and accessed on a smartphone, tablet computer, or similar mobile device.