Optimizing your image can have a great impact in your blog in terms of search ranking, most web designers, scholars surf web to find some reference image or icon to lay more emphasis about there projects, researchs etc. Adding a description to your image is one of the tips an SEO experts will first told you to take consideration of. As we all know that a great percentage of blog traffic depend on image search, so to help search robots to know what your image is all about and what it contains, you will need to add an "alt tag" to your image to help you to improve your search engine ranking, because the more information you give search engine the more you post content will be index.
If you are adding a description to your image, always keep your description short, and make sure you use precise and relevant keywords, your image description must correspond with what your article is all about.
We will be using the image above to sight an example, if you want to choose a description for the image above, you can decide to choose "Tag image for better SEO", "Tips on image tag", "Optimize image tag". so using this type of description means you are telling the search robots, that the image is all about adding tag to a image.

How To Add The Alt Tag To Image

When you want to add a alt tag to your image, always switch back to "Edit HTML" mode, and using the image above as an example.
This is the HTML code for the image above [without alt tag]

This is the html code for the image above [with alt tag]

Replace YOUR DESCRIPTION HERE with your image description, below is an example of alt tag and description for the image above

With this type of description, it means you are telling search robots that your image is all about optimizing image with alt tag, and don't use special characters like =,+,&,*,%,£,@, and so on.
If you have any queries, please don't hesitate to ask, and with this tutorial, i pray you see a great impact of this tips in your blog, stay bless lovely readers.