To enhance performance, Non-Profit Soapbox caches data like article content, menu items and more. This cache means that your website doesn't need to slow down by querying the database each time a visitor comes to a given page. Generally, the cache is cleared globally every 15 minutes.
If an edit you made isn't appearing immediately on the front end of your site, you can always clear the cache manually.
Clearing cache manually
To clear the cache manually, use the Clear Cache icon in the header of your Non-Profit Soapbox administrator near the Editor Toggle. To do so, simply click the icon with the two arrows creating a circle, as seen here: