The answer is not to Google the issue and then look at the images that appear. The world is far more litigent for taking other poeple’s iamges and using them on your site. The time they were happy for the publicity is gone.
For many of my posts, I can use a screen shot of what i am working with, but there still be times when I have no decent image to show. This means I either have to get out the camera and make one, or grab one from the internet.
Fortunately there are many photo sites that offer images for you to show on your own website. You just need to check the small print for their licencing rules and maybe pay a fee. If i am going to use an image as part of a marketing campaign, I will look for a photo to licence. If I am looking for an image to just show a mood or feeling to be the featured image on a post I go to unsplash.
This is a great web site for quality images. The size is a bit limiting and you may find that your keyword does not product exactly what you are wanting. However, that is the price you pay for not paying an actual price for the image.
If you are looking for a more commercial approach to sourcing your images then the image service offered by Adobe is a great place to go. They have a simple plan with a monthly limit and even more impressive, you can ‘try’ images in Adobe Photoshop and Premiere Pro. It is only when you decide they are what you need and you want to produce your output that you need to commit to purchasing the licence. Compared to single licence image sites, these prices are very competitive.