Any content plugins can be triggered inside the FLEXIcontent text field
The resulting final complete syntax for executing the plugin will be like:
{plugin_name}my information{/plugin_name}
For example to use the Josdewplayer mp3 player
Now your end user have to enter the name of mp3 file that is to be loaded by the mp3 player, e.g. mymp3file
This way the plugin text will become it generate and execute this code
{play}your/url /folder/mymp3file.mp3{/play}
Having issues with triggering plugins read more here:
How to use content plugins in Flexicontent item?