It allows users to create and share customized music stations.
Stations can also be adjusted to play older or newer music, more hits or more eclectic music.
As of August 2015, Slacker has more than 300 expert-curated music stations.
Dennis was the former CEO of Music Match, which was purchased by Yahoo Music and became known as Yahoo! The current CEO is Duncan Orrell-Jones, formerly of Nintendo of America and Disney Interactive Media Group, Asia Pacific.
On 13 February 2013, Slacker retired its original look and logo in favor of a new, streamlined design and a simplified logo, now colored orange (as opposed to the black, white and gold colors of the old logo).
On 14 December 2014, a redesign and relaunch incorporated a new logo, a red, white, and black color scheme, and a complete UI overhaul for all platforms.