Under that link is a section called "Global Compiler Settings"
In the picture it shows a red arrow to select "g++ follow the g++11 iso c++ language standard [-std=c++11]"
When I open CodeBlocks and i go to that section I see that setting but there is what looks the same but the 11 is replaced with 14.
Should i stick with 11 like the picture shows or choose the only the looks the same with 14 in it?
C++14 is just a more recent version of C++. It contains a few new things and is mostly backwards compatible with C++11. I see no reason why you would not want to use C++14 (or C++17 if your compiler supports it).