Using QuillBot to paraphrase large sections of text without proper attribution is considered plagiarism by most institutions. QuillBot should only be used to augment your own paraphrasing efforts, not replace them entirely. It's best to properly cite sources and use QuillBot sparingly to put some passages in your own words.  Relying too heavily on QuillBot to paraphrase could still be seen as academic dishonesty. The safest approach is to use it as a tool to enhance your paraphrasing skills rather than having it rephrase everything for you.