https://owl.excelsior.edu/grammar-essentials/common-errors/common-errors-sentence-fragment/
Sentence fragments always make the list of the most common errors, and they are among the most seriously stigmatizing errors we can make. To put it simply, a sentence fragment is an incomplete sentence that you have punctuated as if it is a complete sentence.
Sometimes, fragments are missing a verb. Sometimes, fragments are missing a subject. Sometimes, a fragment is simply a dependent clause punctuated like a complete sentence. Here are some examples:
The haunting of the house on the craggy hill just outside of town.
Because they are hairy and frightening with large, pointed fangs and shiny, yellow eyes.
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But now, for some REAL Rush news for your Rush blog!
Rush’s best-selling album, ‘Moving Pictures,’ celebrates its 40th anniversary today
https://freerepublic.com/focus/f-chat/3934083/posts
RUSH-The Camea Eye (40th Anniversary, with excellent accompanying video)
https://freerepublic.com/focus/f-chat/3933784/posts