To set up instant indexing on your website add the instant indexing snippet, including your Account and Collection ID, to the <head> section of your website.
Once installed, the ping-back will be fired on page load and new content will be added automatically.
Pages are only updated when certain fields are updated (title, description, keywords, modifiedDate).
The pages must be visited (i.e. the page and the script are loaded) within 30 minutes of updating or being added for it to be indexed.