Your site can also be visited over http, without encryption. Anyone who types the address without https stays on the unencrypted version.
What a visitor fills in on an http page, such as a contact form or a login, travels readable over the network. Browsers mark the page Not secure, and many visitors leave. Google prefers the https version.
This is part of the security check, a separate check next to the crawl, in Studio and Bureau, and only on a site you have verified. Snaglist only looks at what any visitor can see from outside. It never logs in, guesses no passwords and sends no attacks. It requests the homepage over http and follows the redirects. If the visit does not end on https, or the server does not answer on http at all, it is reported.
In the report for your client this appears under the heading "Your site can also be visited without encryption". When everything is in order, the report says: "Every visit goes to the secure https version".
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