Answer:
<img> is the tag name for an image element in a webpage.
<img src=""> is the tag, with src="" specifying the source URL of the image. This can be a local URL ("myimage.jpg") or a global URL ("http://www.mysite.com/myimage.jpg"). You can also use a local site URL ("/myimage.jpg"), which refers to the root URL of your website.
Ye basically the img is saying you are putting an image there and src is telling where the image is located.