What tools are used at real work industry? and how safely back up?

Hi anyone working at real work industry,

How you guys safely backup website or application? I’m really curious…I kinda know that they are regually backing up with something…but specifically i dont know

What tools are being used at real work industry for backing up company website or application and also what tools are used for creating website these days?

Probably wordpress, bootstrap…? and add ssl cert in it…and…what database? mysql is still mostly used??

Thanks guys