“Understanding the rules of capitalization is a key part of taking your English grammar understanding to a very advanced level. If you are able to know when, where, and how to capitalize letters and words correctly, you will definitely be ahead of most other English learners.
Some people may tell you that there are far more than just the main ten rules of capitalization in English, which may in fact be true. Other folks may say that there are only three rules of capitalization, and they may also be correct. However, The truth is that, depending on how you organize the rules, the rules of capitalization may be many or few based on how narrow or broad your definition of these rules are.”