A picture is worth a thousand words
Image enhances the readability of your article or page. It is good for your readers as well as for search engines. Search engines parses text as well as images names for the keywords. One of the specialized vertical of Google search is images search, it indexes all the images found in any website over the internet. Since images are an important part of a page or article, hence is the optimization of images.
Follow the rules listed below for image optimization.
- Unique Images: If you have created the image yourself then it is unique but if you or your designer have downloaded from the internet, then make sure it is unique and not identified as a copy by Google. How to check? Go to Google Images Search, click the tiny camera on right of the search box, here you can place Image URL or upload your image, Google will show you possible matches.
In case you need to use images from Google search, you can select a search option “Labeled for reuse”, this option is available after clicking Search Tools button in search results as shown in third image below.
- File Name: Pick the relevant file name for the image file, relevant to image as well as contents where it is placed.
- Dimension: Image dimension that is width and height attributes in pixels
- File Size: Reduce the file size for faster loading, you can use tools like Format Factory, that helps in format conversion and size reduction. Image size and loading impacts page speed which is discussed in On Page SEO for Beginners
- Title: A text displayed when user hovers mouse over the image
- Caption: It is not an attribute of the image tag, but it really helps describing the image, as you can see captions below every image in this article
- Alt: This attribute describes content of the image, this is very important attribute for image oriented SEO.
- Don’t forget to list all your images in XML sitemap, or you can create a separate sitemap for images
For an example, we’ll use a Mercedes
sports car image, which is 259 pixels wide
and 194 pixels high
<img title=”Mercedes sports car” src=”http://www.techno-genes.com/
alt=”Mercedes sports car” width=”259″ height=”194″ />
More: You can read image publishing guidelines by Google for optimization of your website images for the users as well as their search engine.