What is the concept of Sgt. Pepper's Lonely Hearts Club Band?

Why was Sgt. Pepper's Lonely Hearts Club Band such a significant album?
The Beatles had brought the values of the counterculture into the mainstream. By breaking traditional rules about what a “rock album” should be, Sgt. Pepper gave other musicians new ideas and new attitudes to the approach of music. The production of the record also set new standards in expertise and innovation.
How do I know if my Sgt. Pepper album is original?
The records have the standard yellow block writing Parlophone label and the "All rights of the manufacturer" message around the edge of the label starts with "The Gramophone Co. Ltd.". The label displays the "Sold in the U.K." statement.
How much is Sgt. Pepper's album worth?
A signed copy of The Beatles' album Sgt. Pepper's Lonely Hearts Club Band has been bought at auction in the US for $290,500 (£191,000). The selling price far exceeded the $30,000 (£19,700) originally estimated for the rare LP record.Apr 1, 2013
What happens at the beginning of the Beatles
On the Sgt. Pepper's Lonely Hearts Club Band album, the song opens to the sound of a chattering audience, and an orchestra tuning up, which was taken from the 10 February orchestra session for "A Day in the Life".