COOKIES

You need the site to be https.

how can i SECURE my web? https? pls

You need an SSL for your host, and http to https redirect.
If you are planning on using the Nicepage host, support can make sure they're set up.

Yes, I will use Nicepage host. Can you please do it ? or give me some tutorial?

I’m not support. They can check tomorrow.

Okay, then I am waiting for HTTPS my web www.mtfinances.cz
thanks you Merlin! You are the best!