Celtic are set to lift the trophy following their Premiership match against Motherwell at Celtic Park on Saturday.
Fans gathered at the Glasgow stadium ahead of the game to watch the club take part in a celebratory parade.
Celtic clinched their tenth crown in 11 years on Wednesday night with a 1-1 draw against Dundee United at Tannadice, meaning the Parkhead club go straight into the group stage of European football’s elite club competition, where a reported £30m to £40m can be earned.
It was a successful end to the former Australia boss’s first campaign as Celtic manager and he revealed some of the benefits of guaranteed Champions League group participation.
Ahead of the game against Motherwell, Postecoglou said: “It is brilliant.
“There were plenty of motivations to win the title this year, not least that we obviously didn’t win it last year.
“Knowing potentially that the extra carrot was there was a massive motivator.
“I felt it was a great way for us to accelerate our growth as a football club with us being involved at that level and getting exposed to that level: our players, our team, our football club, that is the level we want to be at every year.
“We all know the qualifying process is not straightforward.
“It affects your pre-season, it affects the time off players have, there are all these ramifications.
“It affects your recruiting because you just don’t know, are you recruiting for the Champions League or are you not?
“So all those kinds of things, we can now work with a lot more certainty this off-season and give the players a break, have a really good pre-season and identify the players we want knowing we are going to be playing in the Champions League.
“It is going to be exciting. Celtic Park, Champions League, brilliant.”
On Friday, the club announced that experienced players Tom Rogic and Nir Bitton are to leave at the end of the season.
Both players have said that they want to try new challenges after helping Celtic to win the Premiership title.
The pair will say their farewell to Celtic fans as the club collect the trophy after Saturday’s game against Motherwell.