Ticketmaster
In short
Ticketmaster is a global company that sells tickets for live music, sports, and theatre events. It operates as a subsidiary of Live Nation Entertainment.
In plain words
It is a massive online shop where you buy entry passes for concerts or matches. It handles the booking process and manages the digital or paper tickets for organisers.
A simple example
If a famous pop star announces a world tour, fans visit the Ticketmaster website to select their seats and pay for their entry.
Why it matters
It controls a huge part of the global live entertainment market. Because it is so large, its pricing and booking systems affect how much fans pay for shows.
Easy to mix up
Do not confuse it with the event promoter Live Nation, although they are part of the same parent company.