Waitrose began its "#TasteOfSummer" campaign on Pinterest last week. The campaign was already running on other social media platforms. The campaign asks Waitrose customers for their input on the ultimate taste of summer in a bid to promote the supermarket’s summer range. The trial partnership comes as Pinterest prepares to introduce advertising into its model in the UK. In the US, brands can already pay for posts, called Promoted Pins, on Pinterest, but this is not live in the UK yet.