Just about every Toastmaster meeting has at least one prepared speech being delivered.
Generally speeches are given by club members who are pursuing different Toastmasters educational goals.
Some meetings will have special education presentations called educational sessions (or "ed sessions") which are offered to help the club collectively learn a variety of skills.
Speeches generally are 5-7 minutes and are evaluated verbally and in writing by a speech evaluator. "Advanced" speeches are longer - generally between 10-15 minutes. Educational Sessions are in the same 10-15 minute range.
The club in general will also submit evaluations in writing so the presenter has a variety of feedback to draw from in order to grow.