One part of web design and development that seems to be a pain is images. We love and hate them. With the right set of images the site is informative and inviting. However, if they are not optimized they can make a site very slow and painful for visitors. Adobe Evangelist, Terry White, discusses the "Generate" functionality of Photoshop CC for creating web images in his new blog post.
In 10 minutes, you will learn how to save yourself hours of work. It is worth noting that if you have your layers named for the asset e.g. image.png when all files are generated, that information is brought through in the export/generation.
Sorry this is so short but I have to run and do my homework so that I can save myself time (and of course money) by leveraging features of one of my favorite tools.