Writing Forward has another great resource on capitalization. Read below what they state is the proper use:
Proper capitalization is one of the cornerstones of good grammar, yet many people fling capital letters around carelessly.
Not every word deserves to be capitalized. It’s an honor that must be warranted, and in writing, capitalization is reserved only for special words.
Most of the grammar rules are explicit about which words should be capitalized. However, there are some cases (like title case) in which the rules are vague.
Capitalization of Titles
There are several contexts in which we can examine capitalization. When writing a title (of a blog post, for example), almost all of the words in the title are capitalized. This is called title case.
Read the full article HERE