Banner text issue between browsers

IE is not accepting your Google fonts… such a ridiculous browser. You might try cleaning up the validation errors. Maybe that will help.

Ok thanks but I have no idea how to rectify these? Can you help?

Ok. Part of it is that you are trying to use the Open Graph Protocol but your header isn’t right for it. This claims to be the way to do it but I’ve never tried.

Ok thanks but where does this code go in wordpress?

In your theme’s header.php, most likely.

This doesnt really help ??

‘header.php’ is one of your theme’s files– wp-content/themes/<your-theme-name>. Once you find the file it should be pretty obvious where that code goes. To work much with themes, you will need to start figuring out how WordPress themes work. The basics are not that complicated and nothing is going to make sense until you get a minimal grasp of it.