AWS CodePipeline

The AWS CodePipeline service is very well suited if you already use Amazon Web Services for some of your other Cloud needs. Also, if you want to be agile in your web application development, a continuous delivery service like AWS CodePipeline will be very useful and will make deployment faster, easier and well built.

It is very suited for automation of build, data migration, deployment, and tests for a stack for every push on a branch (or with a different configuration). For large projects, this is great. It facilitates the process of development and testing. Sometimes the space (and costs) are a constraint but the facility is worth it.

CodePipeline is well suited for an already existing AWS-native deployment. It is very easy to connect to existing repos like GitHub enterprise or cloud repos like CodeCommit. Being able to define the process by code (YAML) is a huge benefit for developers who favor that type of deployment setup. The UI is easy to use yet very powerful and customizable. Being able to leverage CloudTrail or Lambda is quite powerful, especially in larger more complex projects.
It becomes less valuable with smaller projects or locally hosted deployments that don't get the benefits of a managed service in the AWS ecosystem. However, there are agents that can be run on private servers to allow integration. But naturally, smaller one-off projects benefit less from the automation value derived by CodePipeline.

AWS CodePipeline is the best solution to use if your application stack is completely AWS-native. This means you are exclusively using AWS tools to manage your source control, build management, and you are deploying your applications to AWS services such as EC2, Elastic Beanstalk, Lambda, EMR, etc. It integrates very well with AWS CodeCommit, CodeBuild, and Elastic Beanstalk to manage source control, building, and deployment. However, it does not integrate too well with third-party source control and build management tools such as Github, Travis, Jenkins, CodeShip, etc.

I think AWS CodePipeline is a great tool for anyone wanted automated deployments in a multi-server/container AWS environment. AWS also offers services like Elastic Beanstalk that provide a more managed hosting & deployment experience. CodePipeline is a good middle ground with solid, built-in automation with enough customizability to not lock people into one deployment or architecture philosophy.

AWS CodePipeline is well suited for a specific software engineering workflow. If there is a need to deploy code within a framework, then this is a great tool to automate the code deployments outward. The scenarios where it is less appropriate is in situations of internal tooling or other code that might not change as often or are tools running locally.

AWS CodePipeline is well suited if your company is already using AWS as the main tool. It also works with ATOM Repository and Snowflake cohesively. There are other options on the marketplace that have the same functionality as AWS CodePipeline. It is only really appropriate if its integrated in the rest of your AWS infrastructure.

If you're already on AWS, then using it as your build/test/deploy system makes a lot of sense. However, there are easier tools out there to do it that may not be as flexible, or may work better with your source control system.