Whenever you’re adding an image to your website, assume that the visitor won’t be able to load your image for a variety of reasons. That’ll force you to consider alternatives such as include an ALT attribute for your image.
Remember, every image on your website should include an ALT tag (alternative text), and descriptive filename for the best search engine optimization. Here’s an example of a good image tag:
<img alt="Christopher Ross WordCamp Toronto 2013" src="https://thisismyurl.com/wp-content/uploads/2013/10/Christopher-Ross-300x225.jpg" width="300" height="225" />
Note that the example includes a descriptive file name (Christopher-Ross), as well as an alt attribute (Christopher Ross WordCamp Toronto 2013) for visually impaired audiences. This helps search engine spiders know what the image is, and improves your ranking!