Please Help Me Read This Survey Data Accurately. I Would Like To Understand Why The Percentages Don’t Add To 100%.

My guess has been that people are answering the survey question with multiple ranked answers, but I’m second-guessing this. If this is the case, how would I word a summary of such information. Ex. “40% of people learn about new destinations from travel websites, 27% from Youtube, and 27% from TripAdvisor.”