If you have made changes (and saved them!), but are not seeing the changes reflecting on your landing page when you open it in your browser, you most likely can resolve the issue by clearing your browser's cache.
You can typically clear the cache from your browser's Preferences or Settings. In Chrome, you can clear your cache by navigating to Preferences (chrome://settings) > History.
Click the Clear Browsing Data... button and deselect everything except Cached images and files. Then click Clear Browsing Data at the bottom of the dialog.
Now that your cache has cleared, refresh your landing page. The changes you've made should now be applied.