The Social Stream, that is, the content of your configured Social Networks, is fetched every 2 hours by default.
You can choose to increase this time interval to 1 hour or 15 minutes. If you need lower time intervals, please contact us.
Go to your Configuration > My Plan and select the time interval that better fits you. Once you choose one, it won't be changeable until the next billing period. This fee is prorrated.