To measure the effectiveness of your brand positioning strategy, you should use a combination of qualitative and quantitative metrics. Brand perception surveys and market research can provide valuable information on how consumers view your brand compared to the competition. Metrics such as brand awareness, social media engagement and website traffic also provide clues about the effectiveness of your positioning. In addition, analyse customer feedback and retention rates to assess whether your positioning is contributing to customer loyalty and satisfaction. Continuous monitoring and adjusting your strategy based on results is key to maintaining effective positioning.