Security is the key to any site. even a simple thing can damage your site. Please follow this –

1. Don’t use any null theme or add-ons at your site. you can find lot of plugin and themes at null site. We request don’t use this
2. Install security plugin like – https://wordpress.org/plugins/wordfence/
3. Always up to date. all themes and plugins and as well as WordPress

This are the key. If you need any security help then contact with us. Some case you need to pay some for security improvements things.