What is the HTML App?
With the HTML App you can add your own HTML code or embed another site onto your Wix site.
To add the HTML App: From the left side of the Editor, click the Add icon > click Apps > click HTML.
Click the HTML App to select it > from the pop-up menu, click Settings > under Mode, choose HTML Code or Website address > enter the code/address > click Update.
Note: Take a minute to read through the Known Issues & Limitations of the HTML iFrame/Embed App before using it.