Use an indirect quotation (or paraphrase) when you merely need to summarize key incidents or details of the text.
Use direct quotations when the author you are quoting has coined a term unique to her or his research and relevant within your own paper.
Indirect quotations are not exact wordings but rather re-phrasings or summaries of another person's words. In this case, it is not necessary to use quotation marks. However, indirect quotations still require proper citations, and you commit plagiarism if you fail to do so.