Noob question: How to understand what the options do?

[Rick]

I am new to Kendo UI for ASP.NET MVC. How can I learn about all of the options for the HTML helpers?

For example, I see code like this in our codebase:

@(Html.Kendo().ComboBox()
        .Name("combobox")
        .DataTextField("ProductName")
        .DataValueField("ProductID")
        .DataSource(source => {
            source.Read(read =>
            {
                read.Action("Products_Read", "ComboBox").Data("foo");
            });
        })
    )

I'd like to understand the line that says "read.Action("Products_Read", "ComboBox").Data("foo");".

I see there is documentation out there, like:
https://demos.telerik.com/aspnet-mvc/combobox - shows the code
https://docs.telerik.com/aspnet-mvc/html-helpers/editors/combobox/overview
https://docs.telerik.com/aspnet-mvc/api/combobox
https://docs.telerik.com/aspnet-mvc/api/datasource

But even in the API documentation, I'm not seeing anything that explains what "read.Action().Data("foo")" does.

I see documentation that says, for example:
DataValueField "sets the field of the data item that provides the value content of the list items".
and
DataTextField "sets the field of the data item that provides the text content of the list items".

Those are the same definitions except for the word "value" and "text" have changed. How do I find out what that means?

Any tips for coming up to speed on this?