- About actions- Predefined actions are the building-blocks of every pipeline. 
- Custom actions- Define your own actions in YAML. 
- Database migration & custom scripts- Run scripts in your build or on a server. 
- Services & databases- Attach databases and other services to your actions. 
- Virtual machines- Build software on dedicated virtual machines with custom AMI templates. 
- Notifications- Use notification actions to keep your team informed. 
- Docker- Learn how to build Docker images and use them in your pipelines. 
- Sandboxes- Sandboxes are dynamic preview environments launched from a Git branch, tag, or pull request.