We are talking about update of installed apps, say, if you have installed kmplayer, there is an update from Extras-devel....Just checked there are 14 updates in 24 hrs, something is eminent , again, if you happened not to have any of those programs installed, highly unlikely, you will then see NO updates.

For 14 updates, clicks the app manager menu on top border, there is a function "update all?", this saves you time to update one by one and wait for refresh of the catalogue after each updates.

bun