> * Ideally, a table of contents should be understandable by itself. In particular, it should be comprehensible before someone has heard your talk.

The typical agenda slide often is more than useless in my opinion.

There are cases where it is good - if you have a recording and discuss individual topics and thus can jump around (but then have time marks as well and jump options in the player), but 99% of agendas are useless and speakers waste a lot of time on them (1. Introduce the speaker 2. Introduce the problem 3. Show old solutions 4. Show the new solution 5. Summary)