dog and pony show

a flashy or impressive event that lacks substance or meaning

The idiom "dog and pony show" originated from circuses and traveling shows that had trained dogs and ponies performing impressive acts to entertain the audience. Eventually, the term started being used figuratively to describe situations where people put on a flashy display just for show, without providing meaningful content or value.

Last month, the CEO staged a dog and pony show to impress potential investors, but the company ultimately failed to deliver on its promises.
The conference organizers organized a series of dog and pony shows, but attendees left feeling disappointed and unimpressed.
During the election campaign, the politician's speeches often felt like rehearsed dog and pony shows lacking genuine substance.
Next week, the marketing team will be preparing for a major dog and pony show to launch their new product line.
If they want to win the contract, they will need to put on a convincing dog and pony show that demonstrates their capabilities.