Does publishing auto-refresh the data

Hi,

I am very new to Power BI, I connected my backend SQL to Power BI desktop and created some reports and published them to web.

When the data in the SQL changes, it will update the reports in the PBI Desktop, question is, will it refresh the data on the web aswell, since I have published the reports out ? if not auto refresh, do I need to manually click the refresh button to have them reflect in the web ?

Thanks,