Want to copyright your images? Check out Creative Commons for the different license types for yourself and to better understand how other creators have protected their work.
"TinyPNG uses smart lossy compression techniques to reduce the file size of your WEBP, JPEG and PNG files."
Already have an image you like, but need the details to give the creator credit through a citation? Below are two image locators.
Search with an Image on Google
With images you locate and use, credit must be given to the creator with a citation. That's called attribution. See "How to Cite Images" section of this Libguide for how to cite images in different contexts.
If an image is in the public domain, or the site says images are free to use, or categorizes them as "stock" photos, it's still best practice to give the creator credit. Some sites, such as Pexel, state that attribution is not always required, but again, as the site states, it's best practice to do so.
Looking for icons to spice up your presentation? Check out the Noun Project. It's free and when you download the image, it includes the citation information.
Tip: When you save the icon, you want to be sure to select "Basic Download" in order for it to be free. Save as .png if you want to use it as an image. Save as .svg if you plan to use it in animation.