There is a difference writing for the web from print, when you write headlines on the web one of the most important thing about writing a headline is that it includes key words so that it is easy to search. Things like alliteration, puns, cryptic and a play on words but you cannot do that writing for the web. You should make it direct and straightforward when online so that it is easy to search on the internet. When writing headlines you do not need punctuation, nor full stops. When you are quoting someone only use single quote marks or you can use a comma. For capital letters, traditionally cap up the words.