Greetings Nidaimam!

Ensuring site’s security is topmost priority of any developers and clients. You can make it by using many techniques such as follow :

1. Use STRONG password :  Password of any site should be strong and mixture of characters, digits, symbols and cases. This will make your site protected from unauthorized user/hackers. Don’t ever use password like admin123 or something like this. It will make more vulnerable for attacks.
2. DOUBLE verification is must : You should have 2 step verification into your site which will create more levels of security and authentication.
3. use HTTPS instead of HTTP : Not only this will increase faith of your site users but will also make site more secure as it uses encryption of information while it is being sent from clients to servers.
4. SSL certification: secure socket layer adds up more security to your site so must in incorporate in site security features.
5. Updates : Necessary plugin and themes should be updated periodically.

This are few of steps you can take to increase your sites security and protect it from possible vulnerabilities.

Hope it will help you out.

Have a great day