In order to edit the title that says "Featured Cases" on the Featured Cases slider, please check the instruction below:

Go to Dashboard > Slider Revolution > Featured-cases-slider > click on the Static / Global Layers 

Next select the Slide ID in the drop-down menu and edit the Featured Case title: 

Please check this guide if you need more help in editing Slider Revolution: Vamtam Beaver Themes: Guide to Revolution Slider