This is the nice beach of the village / small town of Polychrono.
Polychrono is a popular tourist destination. The beach is not too wide but as almost all Halkidiki beaches is quite long, so there is place for everyone, even during high season.
During a typical day the beach is visited by doughnut merchants, trinket sellers and masseurs. The doughnuts are called "Loukomades" in Greek and are often filled with chockolate. The trinkets are usually watches or bags, and the masseurs offer to take you apart and put you back together for the price of 20-30 euro(43 usd). It is quite refreshing.