Caching or not caching data

I am unsure about the Data Caching on Server Connect, can someone clarify for me please.

I know that if I wanted to cache the results of an API query and restrict that call to no more than once an hour, then I would set the “Cache for” to '3600'.

But what if I want to ensure a fresh call for any Server Connect element each time the page is opened and not cache the results at all, should I be using this Data Caching and setting the “Cache for” to '0'.