A colon is used in a sentence to further demonstrate or exemplify the information. Colon is a silent message of “as follows,” “which is/are,” or “thus”.
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Colon can also be used for further clarification:
Examples:
Colon can also introduce a quotation:
Examples:
A capital letter generally does not introduce a word, phrase, or incomplete sentence following a colon.
Examples:
Avoid using a colon before a list if it directly follows a verb or preposition that would ordinarily need no punctuation in that sentence.
Always Remember! A colon should not separate a noun from its verb, a verb from its object or subject complement, a preposition from its object, or a subject from its predicate.