Once you've run a crawl of your site in Site Audit, you might see a 'HTTPS to HTTP redirect' warning in the report under the Internal pages menu:
This is referring to pages on your website on a HTTPS protocol but are now being redirected to a page with HTTP protocol.
Why is this important for SEO?
It is not recommended to redirect HTTPS URLs to HTTP URLs as the HTTP protocol does not provide the integrity and confidentiality of data between your visitor and your site.
The HTTPS protocol is considered to be better as it is secure - it encrypts the information between your browser and the website.
Customers are also more likely to trust and complete purchases from your site if you're using HTTPS.
Do also bear in mind that Google has explicitly stated that HTTPS is a ranking signal.
When should I redirect a page from HTTPS to HTTP?
There are very, very few (and niche) occasions when you would need to redirect a page from HTTPS to HTTP.
As a general rule, we do not recommend redirecting in that manner. You should always make sure that the destination page in a redirect uses the HTTPS protocol.