Contact Form 7 Plug-in

I’m not a ‘code guy’, so here I am asking for help. maybe someone has experience with this plug in? I looked into several contact forms plugins, even tried a few others, but this one seemed a good balance of options-versus-complexity,

I started using the "Contact Form 7" plug in and made a form on my blog's Contact page.

Using the only the form editor, I was able to add a separate box asking “How’d you arrive at this blog?”

I can format that, and have it appear properly in the finished contact form, but in testing, no text from that field is sent to me.

Ideally, someone would re-word for me the plug-in author’s process for achieving this. I just don’t follow his explanation 100 percent and have not found it reworded or otherwise demonstrated anywhere.

Any help is appreciated.