First create your ShareProgress page, then create a redirect page in Nationbuilder.

1. Create Your ShareProgress Page

After you create a page on ShareProgress, you will receive a URL for your newly-created share page. Highlight this URL and copy it on to your clipboard.
You will be given your share page URL after you create a share page.

2. Create a Nationbuilder Redirect Slug

With your ShareProgress share page copied, log into your Nation and create a new "Redirect" page. Nationbuilder has many different options for pages, the redirect option will look like this:
This is what the Redirect Page option looks like.
Paste your ShareProgress URL as the redirect URL and save your redirect page. Copy your slug for the final step.
Create your slug for the ShareProgress redirect.

3. Add your redirect to your Nationbuilder Petition

Find your petition on Nationbuilder and click on the "Petition Settings" tab and then click on the "Basics" subtab.
When prompted "After signing, what page should they land on next?", select the redirect slug you created in step 2.
You are almost done! Paste your after-action slug and your community will land on your ShareProgress page after signing your petition.