Add the widget to Blogger

Paste the Script snippet into an HTML/JavaScript gadget. Use it on every page for a modal or floating bar.

You need a published widget first. On the widget page, copy Script (Blogger, most sites).

Blogger accepts that script. Prefer it over the iframe so modal, delay, scroll, exit intent, and the floating bar still work.

Sidebar, footer, or below the posts

Open your blog in Blogger.
Go to Layout.
Choose Add a gadget in the column where the form should sit (sidebar, footer, or under the posts).
Choose HTML/JavaScript.
Paste the Script snippet. Save the gadget, then save the layout.

The form appears on pages that use that layout.

One post or page

Open the post, switch to HTML view, and paste the Script snippet where the form should appear. Return to compose view and publish.

Modal or floating bar on every page

Put the Script snippet in a gadget that loads on every page (header, footer, or a sidebar gadget you do not hide). The script decides when the modal or bar appears. You do not add a second button.

Closing a bar or timed modal hides it for the rest of that visit.

If nothing shows

Confirm the widget is Published, not Draft. Preview the live blog, not only the Blogger editor. If a theme still strips the script, use the Iframe snippet in the same HTML/JavaScript gadget — the form will show inline, without a page overlay.

Readers still confirm from their inbox.