When you go to upload your image, it’s label will default to whatever name your camera or the stock website gave the file. While it may seem tedious, take a moment to rename your file with descriptive words in order to help your webpage rank higher on search engines.
Bots crawling through pages pick up on image file names just like they would text, and they will be more likely to pick up a filename like your-product-here.jpeg over a hodgepodge of letters, dashes, and numbers. To get the most from your keywords, use Google Analytics to find the most search phrasing for the terms you plan to use.
Alt Tags are the text alternative for images when a browser can’t render them and can add value to your website by associating keywords to your images. Be sure to fill out an alt tag for each product on your website, so they will be more likely to get picked up by bots.