Open your Nicepage project and go to the page where you want to add the widget. Click on the "Add Element" button.
Select the HTML element from the list.
Paste the widget code to the "Code" field in the Element Settings. You can adjust the element size. Preview your site to see the widget working.
Please note that the appearance of your widget may depend on your website's styles. Avoid adding your widgets to existing elements or blocks if possible. Certain features might be blocked on some platforms.