Many without realizing it will use copyright images or will purchase Stock images. If you have budget limitations or you’d rather spend the money on a milkshake/burger than stock images, then say hello to Unsplash.
Unsplash is a resource of images that you can use without worrying about copyright. You have a complete right to use images from Unsplash anywhere.
You can add that image to look at your blog looking good. A good, attractive image receives a number of clicks than a link with no or unattractive image.
Unsplash – https://unsplash.com/