What is this weebly?

I am trying to see. I guess, they are trying to make making pages easier. I don't know if it works. Perhaps for others? At the moment I see a clutter of buttons, certainly convenient buttons, or one convenient button at the time. However I see contact forms. (Hey, I just used the italic button, it works well :-)). But what about   LaTeX   ?

I see that the speller is checking my text, as I write it, that's nice (even if today you expect it).

Hm, the contact form seems to serve email only.
Hm, what is this Custom HTML? How is it different from Paragraph with Title? I guess, here I am on my own, no more italic buttons.