Are you talking about images you have on your own computer or ones you download from the Internet?
Some on the Internet are protected so you cannot copy paste them.
You can sometimes get round this by saving the image as a jpg. file on your own computer then inserting it where you want it, as you would for any other image.
If it is a photo you have on your computer from your own camera or phone, then using the save as image menu in Word stores the picture in a smaller electronic format which facilitates sending it electronically, and does sometimes make a difference when you are trying to insert it in a document.
Taking dogs on holiday in summer



