Below is the code to add featured images to your site:
Below is the code to display a custom Gravatar on your site:
Below is the code to display a custom favicon on your site:
Sometimes it works better to replace the image directly in the theme’s images folder. Please see this step by step.
It can take a very long time for some browsers to clear the cached favicon. If you can load the favicon URL in a browser directly and see it changed, then the browser tab will eventually show the correct one.