Submittals include product data, shop drawings, samples, test reports and warranties. Part 1 of each spec section lists what that section requires.
A flooring sub sends product data and color samples. A door supplier sends a hardware schedule with a cut sheet for each item.
Count the submittals when you bid. Each one takes office time. Samples and engineered drawings cost money.
Do not order material before approval unless you accept the risk. Add the review period to your lead time when you plan the schedule.