Please can you explain. Thank you_html/css_WEB-ITnose

.page-title i{background-size:179px 175px;background-image:url(../../images/public/public.gif@22);}

This CSS, If you double-click the webpage to open it, you can see this picture. If you open it in IIS, you cannot see this picture.

If the @22 at the end of the picture name is removed, and the @22 at the end of the picture itself is also removed, there will be no problem.

Can an expert explain why we need to add @22 after the picture name? , what are the benefits?

Reply to the discussion (solution)

Solve the cache problem

Are all the image suffixes the same? IIS can be set to browse without image suffix format, search for details.
The advantage is probably that it prevents others from downloading it