Most tag managers require specific tags to be added directly to the code of each element.
For example, to add a tag to a button you would need to add an HTML tag to the code for this button. When working with a code free editor like Webydo, you do not have this ability. If you require an ROI tag for an element, the entire element must be added in with code in order to include the tag.
Google Tag Manager however, does not require this and allows you to manage tags on yoru site by adding just one snippet of code.