Often, a recruit makes a commitment and shuts down his recruitment. He's given his word to a coach that he'll be joining the program, so there's no need to continue dialogue with other schools.
However, some recruits continue flirting with other schools after pledging to a program. Looking across the landscape in the 2015 class, several committed prospects are still showing attention to other schools.
A 4-star defensive lineman and Alabama commitment still likes Georgia, while the Bulldogs are hoping a 5-star athlete's affection for Auburn doesn't result in him decommitting. Also, a 4-star running back who is earmarked for Florida Atlantic has several other schools in his ear.