Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The 2020 MLS Cup Playoffs (branded as the 2020 Audi MLS Cup Playoffs for sponsorship reasons) was the 25th edition of the MLS Cup Playoffs, the post-season championship of Major League Soccer (MLS), the top soccer league in the United States and Canada. The tournament culminated the 2020 MLS regular season. The playoffs began on November 20 and concluded with MLS Cup 2020 on December 12.
On October 29, the league announced that the final regular season standings and playoff qualification would be determined by points per game rather than by overall points. This was due to eight MLS clubs, all in the Western Conference, being unable to play all of their scheduled 23 regular season matches in time due to the COVID-19 pandemic. Seven postponed matches were cancelled altogether in order for the playoffs to be able to start on the scheduled date. A 12-day break between Decision Day and the start of the playoffs was added to accommodate an international break; MLS waived quarantine requirements for players who returned on charter flights, but several positive cases affected the opening rounds.
Seattle Sounders FC were the defending MLS Cup champions, having won their second title in MLS Cup 2019. They were beaten by Columbus Crew SC 3–0 in the MLS Cup final. As a result, Columbus Crew SC earned their second MLS Cup title, and first since 2008.
This round was only applied to the Eastern Conference. The seventh-placed team, Nashville SC, played the tenth-placed team, Inter Miami CF, while the eighth-placed team, the New England Revolution, faced the ninth-placed team, the Montreal Impact. The lowest-ranked team to advance from this round, the New England Revolution, advanced to play the conference's first-placed team, the Philadelphia Union. The highest-ranked remaining team, Nashville SC, advanced to face the conference's second-placed team, Toronto FC.
Note: The higher-seeded team hosted matches in the first three rounds. The team with the better regular season record hosted the final.
Source: 2020 MLS Cup Playoffs Bracket
First round
The top four teams in each conference hosted the first round matches.
Toronto FC hosted their playoff match at Pratt & Whitney Stadium in East Hartford, Connecticut. BMO Field was not available due to travel restrictions between Canada and the United States.