Quotations

Quotation marks 

Quotation marks are primarily used to indicate material that is being reproduced word for word, as well as some other important uses. Quotation marks and adjacent punctuation Though not necessarily logical, the American rules for multiple punctuation with quotation marks are firmly established. (See here for a brief explanation of the British style.) Commas and periods that are part of the overall sentence go inside the quotation marks, even though they aren’t part of the original quotation.

Ellipses 

An ellipsis is a set of three periods ( . . . ) indicating an omission. Each period should have a single space on either side, except when adjacent to a quotation mark, in which case there should be no space. Informal writing In informal writing, an ellipsis can be used to represent a trailing off of thought.

Brackets Brackets 

allow the insertion of editorial material inside quotations. Clarification If the original material includes a noun or pronoun that is unclear, brackets can be used for clarification.
TAKEN FROM: https://www.thepunctuationguide.com/brackets.html