Make sure the image is not too large in size simply because you have to keep in mind the loading speed of the page
. An image having thousands of pixels will take up some time to load which slows down the loading of your web page and is bad for SEO.
Alt Tag attribute is used to describe what the image is about also called alternative text. So when you hover over the image your description comes up. You want to make sure your descriptions are right and appropriate for each individual image. For SEO
it’s very important and Google does look at the Alt tags.
If you have a website that’s full of images you can create a separate sitemap
for images. It helps Google with indexing all the images on your website. You can use the extension for images on Google Sitemaps
to give Google more information about the images on your website, and doing this can help Google find more images than what would be conventionally found through their search engine.