If you've made changes to the content in your CMS, but the updates are not reflected when you view the page, it's possible that you are still seeing a cached version of the page.
There are two primary caches: one is in your browser, which keeps a copy of recently viewed pages so that it doesn't have to request them from the server again. This cache can be flushed by using the "Clear browsing history" functionality in your browser (the exact method varys by browser model).
Manifesto also caches content, both full pages and chunks of reused content, like the footer. To flush this cache and refresh your content, simply click the "Clear cached files" link on the left-hand sidebar of the Editiorial or Administrative backend. This is always safe to do at any time, so don't hesitate to try it!