Image optimization is nothing but optimizing your images to make them more search engine friendly. We can minimize the download time and save bandwidth by using thoroughly optimized images i.e. most compressed yet visually acceptable image in the proper file format.
If a user is made to wait for more than 10 seconds, he is most likely to hit back button on the website, or he may click on content that’s loads first instead of waiting for the entire page to load or he may leave your site entirely. Bandwidth costs money, and if you are using large size image without optimizing them, you are going to wastes a precious bandwidth that will end up costing you money, customers or both.
Important aspects of Image Optimization :
Alt Text
Alt tag help search engines to know what your image is about and to understand images better and rank them. For e.g., <imag src=”kids dancing.jpg” alt=”Kids Dancing”/>
File Size
You should make the image file size as small as possible without sacrificing the quality. You can use an image editing program to make your image a desired size. Do not let your browser resize a large image to look smaller. When you have a large image, and input height and width tags on that image to make the image smaller, people load the large image first, and then the browser resizes it.
Anchor Text
Always use descriptive anchor text that describes the image. If you are linking images with a text, anchor text will help your images ranked for particular keywords.
File Name
Always make sure to give a descriptive filename for your images while uploading them. Using keyword-rich words in your image filename is important for helping search engines determine relevancy.
Captions
Image captions are also very important as they are one of the most well-read pieces of content on your entire site.
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