Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
With this Plugin you can use your Blocks Models in other Blocks. So it´s a Plugin for nested Content. The Content you can use can be set in Field Settings if you´re my the Field Editor.