How to check cervix?

Monica • I`m a 25 year old military wife and mother to our 5 year old son, Rylan and our sweet Maci born 7-17-15.
The new update has a thing to check service for high or low, hard or soft. How do I know and check? What does my cervix feel like and what does each of those mean? Sorry this might be a silly question but I've never done that before or heard about doing it and it's reasoning. Thanks :)