Help pls - Cloudflare SSL/TLS encryption mode settings?

[xtorjack]

Need help. What is the settings I should choose in SSL/TLS encryption mode in cloudflare? Off (not secure), Flexible, Full or Full (strict)? thanks in advance

 

[NetedgeTech]

For optimal security and encryption, choose "Full (strict)" mode in Cloudflare's SSL/TLS encryption settings, requiring a valid SSL certificate on your origin server and strict validation by Cloudflare. If you don't have an SSL certificate, use "Flexible" mode temporarily, but aim to install a certificate for better security.