You can measure the effectiveness of storytelling through classic engagement indicators - time spent on the page, number of views, comments, shares. Conversions are also important - how many people decided to make a purchase, subscribe to the newsletter or contact you after reading the story. Analytical tools such as Google Analytics, Brand24 or Sotrender will be helpful. It is also worth collecting feedback from users through surveys, comments, messages. Ultimately, the measure of storytelling effectiveness is the increase in brand recognition, customer loyalty and sales.