I don't understand the concept of Forge

You'll have to look at the AWS site for costs.

Forge is just a VERY convenient way to set up and deploy your apps to the listed providers.

Thank you @topvillas.

I got confused because on Forge website there is a screenshot where you can select the provider and the planning. Do you buy the planning in Forge? How I can see the plannings that offers the providers through Forge?

Then, for the databases, Forge website says

"We install Nginx, PHP 7.1, MySQL, Postgres, Redis, and all of the other goodies you need on the cloud of your choice. No more out-dated PHP installations."

Yes, but with what provider? If I select AWS provider, then I will have MySQL Amazon services? I don' understand.

You'll need to set up your AWS, Digital Ocean or Linode accounts separately and provide your credentials to Forge. But, Forge does all the provisioning for you. So us non-sysops can avoid all the tedious server management.

Think of it a bit like Homestead for staging/production.

@topvillas, I've never managed a server in my life, so I understand that instead of install manually Mysql into AWS server (before purchased it on AWS website), Forge installs Mysql and upload Laravel app files for production.

Yep, that's pretty much it. It provisions a server of the type you specify and installs everything you need including MySQL or PosgreSQL.

But Forge pulls your app from a git repository.

Thank you @topvillas, and only a last question...

Forge performs backups, or I may perform backups through AWS?

Backups are something you'll have to sort out yourself.

But this might make things easier ....

https://github.com/backup-manager/laravel