What is the purpose of image assets in photoshop, it is very useful to your project?

Image Asset serve a purpose of generating multiple sizes of the same image without distortion and save lots of time. Image Asset Generator can be found on the File Menu: File - Generate - Image Asset. Its very useful in project where a single image need to be resize in multiple places.

This is the very core of responsive web design.  Image assets are basically layers of various imagery in your photoshop document. Although these assets (images) are raster and not vector, they still help in creating various sizes of the same image.  It also helps in generating various extensions of the same image. Here is how it works.

In your Photoshop document, click File > Generate > Image Assets. Append appropriate file format extensions (.jpg, .png, or .gif) to the names of the layers or layer groups from which you want to generate image assets.

Yes, of course. It is very useful in varias projects. Its save you time also.

Generating image assets from a PSD file is particularly useful for multi device web design.

You can generate JPEG, PNG, or GIF image assets from the contents of a layer or layer group in a PSD file. Assets are automatically generated when you append a supported image format extension to a layer name or a layer group name. Optionally, you can also specify quality and size parameters for the generated image assets.

Yes, it is. It helps editing the image and enhancing the images with the custom personalisation.

if we explaining and projecting regarding any product, or about any thing it's very important to visualize that product such the way so we need photoshop to do all that. 

We can find different opinions about the use of Photoshop negative as well as positive opinions, but that makes this program that is not only necessary if not very attractive for graphic design, outside the styling of images Photoshop helps us and allows us to express our ideas and inspirations when designing opens the doors to a myriad of options to create.

We can generate images as required and can access them at any time.

yes it's very useful, where it is used for editing image size, which means that you can export your image to various sizes.

It's a must tool in web design work.

Images are the shortest way to express your feeling in a short time for marketing