What is instore radio?

It is now becoming popular to have in store radios and most of the up to date stores which are very technilogical have them, as it helps to promote them and can sometimes gain them those vital extra sales. One of the most well know stores to do this is Asda. One station that provides radio for many stores is Headland Media they provide instore radio for many companies one of which is Asda Fm. On Asda Fm they mainly have a 90-10 ratio of Music and Speech, with 90% Music and 10% Speech, All the speech is mainly for advertising perposes advertising the shop and all the instore deals that they currently have going on at asda, and the music is mainly songs that they will sell instore or are relevant to the type of people that shop in there store.