Citeste asta inainte: https://websitesetup.org/http-to-https-wordpress/

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Decreased Search Rankings
Making the switch from HTTP to HTTPS can influence your rankings negatively. What?! Didn’t I say earlier that this is good for SEO? Why would your rankings go down then?

Before you go back and kick HTTPS to the curb, hear me out first. If your SEO is affected negatively, this is usually only temporary.

You see, Google treats https:// and http:// URLs as two different entities. Even if you set up 301 redirects (as we have done above), those only transfer 90-99% of the link juice. That’s why your rankings might go down in the beginning.

However, after the initial dip, they should actually increase over time. As mentioned, Google considers the use of SSL a positive ranking factor, so if you move your website to HTTPS, you actually make it more attractive in their eyes. This will benefit you in the long run.