Questions about the MSI gaming app

I built a gaming PC two weeks ago and was looking at the MSI gaming app that came with my graphics card. I'm new to overcloking and don't want to do anything stupid and break my new graphics card so this looks great I just click gaming mode and I get more performance. However when I click gaming mode is the overclock permanent or is it just while I have the app open and is it safe to have my GPU on gaming mode all the time? 
My specs 
CPU: Intel Core i5-4670 3.4GHz Quad-Core Processor
Motherboad: MSI B85-G41 PC Mate ATX LGA1150 Motherboard
RAM: Patriot Signature 8GB (2 x 4GB) DDR3-1600 Memory
HDD: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: MSI GeForce GTX 770 2GB TWIN FROZR Video Card
PSU: XFX 650W 80+ Bronze Certified Semi-Modular ATX Power Supply
Case: NZXT H230 (Black) ATX Mid Tower Case
Optical Drive :Lite-On iHAS124-04 DVD/CD Writer
OS: Microsoft Windows 8.1 pro (64-bit)

I have no idea why it is laid out like this. It is fine in the preview,  so sorry for the messy layout 

You don't need to OC , the 770 will oc all by itself , unless you really want those 3 fps extra .