Final answer:
To use a PNG image without a background, create or edit the image with a tool that supports transparency, remove the background using selection tools and save it as a PNG. This transparent PNG can be placed over other backgrounds seamlessly.
Step-by-step explanation:
To use a PNG image without a background, which is often referred to as a transparent background, you need to ensure that the image has been saved in a format that supports transparency. This is one of the key strengths of the PNG format. When creating or editing an image, you can use an image editing software such as Adobe Photoshop, GIMP, or online tools to remove the background. You may use the "Magic Wand" or "Quick Selection" tools to select the background and then delete it, leaving only the desired image elements on a transparent layer.
When saving the image, you must choose the option to save it as a PNG, ensuring that it retains the transparency. When you place this PNG image onto a web page or in a document, the parts of the image that are transparent will allow the background of the page or document to show through. This makes PNG images ideal for logos, icons, and other graphical elements that need to blend seamlessly with their background.