Yes, it is possible to hide the "thank you" page from being indexed by Google in Webflow. Here are a few methods you can use to achieve this:
1. Use a robots.txt file: You can create and upload a robots.txt file to your Webflow site which instructs search engines not to index specific pages. Simply add the "thank you" page URL to the Disallow directive in the robots.txt file. For example:
```
User-agent: *
Disallow: /thank-you-page.html
```
This will tell search engines not to index the "thank-you-page.html" page.
2. Add a "noindex" meta tag: Another method is to add a "noindex" meta tag to the head section of the "thank you" page. This tag tells search engines not to index the page. You can achieve this by adding custom code to the page settings. Go to the page settings, select the "Custom Code" tab, and add the following code:
```
These methods will help prevent search engines from indexing the "thank you" page and displaying it in search results. However, it's important to note that search engines may still discover the page through other means such as external links.
Additionally, consider setting up proper redirects for your form submission. Instead of displaying a separate "thank you" page, you can redirect users to a customized confirmation message on the same page or another relevant page. This avoids the need for a separate page altogether.
Remember to regularly check your site's index status on Google Search Console or other SEO tools to ensure that the "thank you" page is not being indexed.