A lighter solicitation used for simpler or smaller buys. You submit a quote, price leads the decision, and the writing burden is far below an RFP. Technically a quote is not a binding offer the way a sealed bid is, but treat every number you send as one you would honor.
In a sentence
"Quotes are due Friday; award will be made to the lowest-priced technically acceptable quoter." Price wins among everyone who clears the bar.