The HTMLEmbeddedContent template is used to embed content on a web page. This content could be e.g. a BusinessChart or a QRV. Inserting a BusinessChart allows for showing statistics related to the current object.
Concerns: The object that contains information about what should be shown.
Url: The URL can be to a file that can use the attributes specified to display content in a special way. E.g. there is a .aspx file that specifies how a BusinessChart is shown.
External: If the content comes from an external source, this should be checked.
Attributes: The attributes to be used by the URL. This can e.g. be the repository ID, configuration ID or object ID.