Naming to docker.io/library/imageName

When I build an image from a dockerfile, I see this statement appear in the docker build log, as the last statement of the build log that prints in the console.

What does this mean? Does this mean a copy of the image has been pushed to docker.io?

If so, is there any way to prevent this? It seems to continue happening even if I run docker logout.

If it matters, I am currently using a fresh install of docker for windows with wsl2 integration, and am running the docker build command within ubuntu linux.