Short answers, pulled from the story.
Seeding is the practice of separating the most skilled competitors from each other in the early rounds of a tournament by placing them in different parts of the draw bracket. The goal is to ensure that the strongest players or teams only meet in the later stages of a competition.
The term was first used in tennis and is based on the image of a farmer scattering seeds across a field. Tournament organizers scatter the names of top competitors across the draw bracket in the same way, giving each one room to advance before meeting the other top players.
The four Grand Slam tournaments adopted the 32-seed format during the 2001 season. The change followed a complaint by French Open champion Gustavo Kuerten, who argued that clay-court specialists were at a disadvantage under the previous 16-seed system.
World No. 33 Florian Mayer was drawn against then-World No. 1 Novak Djokovic in the first round of the 2013 Wimbledon Championships. Mayer eventually lost the match, which was also a rematch of their quarterfinal from the previous year.
The NFL playoffs and the WNBA playoffs use re-seeding. The NBA playoffs and the NCAA Division I men's basketball tournament do not. The Stanley Cup Playoffs used re-seeding between 1975 and 1981 and again from 1994 to 2013, and the MLS Cup Playoffs used it until 2018.
The highest-ranked national teams are placed into Pot 1 of the draw, with remaining teams sorted into further pots based on their FIFA World Rankings positions. Teams from the same confederation are generally kept in separate groups, with an exception for Europe due to the large number of UEFA teams in the tournament.