Only tangentially related, but can someone give me the pitch for Earthly? I think I'm just missing something basic. Our CI consists of tests, builds and deploy

Only tangentially related, but can someone give me the pitch for Earthly? I think I'm just missing something basic. Our CI consists of tests, builds and deployments (all docker containers) that are kicked off in bitbucket pipelines. Is there some way that either our local development or CI builds can be improved by using earthly? Appreciate any info!