Your website files and images need to be sent to each visitor that you receive. Webnode limits the amount of data that you can send each month (1 GB, 3 GB & 10 GB) for the different plans (Limited, Mini & Standard). 1 GB of bandwidth will more or less last for 1000 visitors per month.
If you go over the limit, you’ll have to buy more bandwidth from Webnode to let visitors browse your website.