There are a couple of ways to properly search for an image online to avoid copyright infringement:
1. You can Google "free stock photos" to find the various online sites that offer hundreds of images free of charge for anyone to download and use in their display advertising.
2. You can do a Google Advanced Image Search and choose the keyword of your choice (e.g. the keyword I used to find my avatar for this forum was "best seller") along with this usage rights option: free to use, share or modify, even commercially.
For example, by doing that Google advanced search, I found this page where you can clearly see this is a free vector graphic that can be downloaded by anyone to use: https://pixabay.com/en/best-seller-s...mp-red-158885/
How can you be sure the image you're using is safe? Here is Google's advice in that regard:
Does anyone else have any additional advice to add here? Any lessons learned in this area that you want to share with others so they avoid the same problems you encountered?