adding google adsense codes to sparky site

i built a site, www.kingsflairinternational.com/ with sparky.
but how can i add google adsense, buttoms and banners to my site?
where in the come can edit to have that and in which location

You have to turn of text filters in joomla global configuration. Then allow all tags in joomla editor plugin. Use custom html module to add code you get from google.