If you have not been using ALT tags for your images that you posted online already, you should go back and rectify this mistake so that your images are properly optimized for the search engines.

The same is true for HTML elements and attributes on the page, like H2s and image alt tags. So, let’s dive in. Here are the top 14 meta tags and HTML elements for you to use on your site.

Discover the key HTML tags and attributes that are crucial to good SEO. ... it is needed for the image tag to work. 11. Alt Attribute. The above image tag example also contains a second attribute, ...

Now if this was the HTML page itself, it would be pretty easy to send an HTTP header to clue in the browser (force expiry IIRC), but the browser will ask for the image in a separate connection ...

You will see a special HTML img tag that looks similar to the one in the text shown below: The image tag's code begins with a less-than symbol and ends with a greater-than symbol.