Scallop shells are a symbol of the pilgrims who are completing the Camino. There are various theories as to why this is the symbol, mainly due to the death of Saint James. Other people think it is for practical purposes such as gathering water from the fountains. You will see nowadays most people just put them on their backpacks to show that they are a pilgrim.
You can purchase a Scallop Shell at many local shops and stalls along the Camino.
