You will see the applications listed in that folder, click an application you want to install.
Then click Install .
Click Confirm to confirm the installation.
Installation will take place.
To remove an application in Cydia, go to Manage > Packages .
Select the application you want to delete.
Then click Modify .
Select Remove to remove the application in Cydia.
Finding applications in Cydia is easy, just go to Search and type the application name in the search box. For example, if you want to find SBSettings application, type SBSettings in the search box.
Click to select the application to install as usual.
These are basic guidelines for new users of Cydia. After being familiar with Cydia, you will find great applications on this app store to make up for the shortcomings of iOS devices such as not running flash or not transferring data via bluetooth to the non-Apple devices.