der Auftakt
opening
The beginning or opening of an event, a process, or a development.
Die Rede des Direktors bildete den Auftakt zur Jahreskonferenz.
The director's speech formed the opening of the annual conference.

opening / upbeat
Loading your saved state.
opening
The beginning or opening of an event, a process, or a development.
Die Rede des Direktors bildete den Auftakt zur Jahreskonferenz.
The director's speech formed the opening of the annual conference.

'Auftakt' (opening / upbeat) is made up of 'auf' and 'Takt' (beat / measure). The word originally comes from music and refers to the unstressed part of the measure before the first main accent (the 'upbeat'). From there, the meaning was transferred to the beginning of events.
Das Festival beginnt mit einem musikalischen Auftakt.
The festival begins with a musical opening.
In the general meaning, 'Auftakt' (opening) is often combined with the verbs 'bilden' (to form) or 'machen' (to make). The preposition 'zu' introduces what something is the beginning of.
Ein Feuerwerk machte den Auftakt zu den Feierlichkeiten.
Fireworks marked the opening of the celebrations.
This meaning is a technical term from music theory. You find it only in texts or conversations that deal with the analysis of musical pieces.
Viele Nationalhymnen beginnen mit einem Auftakt.
Many national anthems begin with an upbeat.
end
'das Ende' and 'der Auftakt' form a clear contrast when talking about events, processes, or developments. 'der Auftakt' is the beginning or opening, in other words the first step. 'das Ende' is the end or the final part. 'Auftakt' often sounds a little more ceremonial or organized than simply 'Anfang' (beginning) and fits well with concerts, games, projects, or campaigns. 'Ende' is general and neutral.

Der Auftakt des Turniers war ein spannendes Spiel zwischen zwei starken Teams.
The opening of the tournament was an exciting game between two strong teams.
Das Ende des Konzerts war sehr ruhig und schön.
The end of the concert was very quiet and beautiful.