I've always heard of the term insurance and that I should buy insurance if I buy a car.  What does that mean?
Insurance
Insurance is a means of protection from financial loss. It is a form of risk management, primarily used to hedge against the risk of a contingent or uncertain loss.
An entity which provides insurance is known as an insurer, insurance company, insurance carrier or underwriter. A person or entity who buys insurance is known as an insured or as a policyholder. The insurance transaction involves the insured assuming a guaranteed and known relatively small loss in the form of payment to the insurer in exchange for the insurer's promise
there who'll read an interview and think '"Imagine"? I've never heard that song.' and he might go and buy the album, you know what I mean?" Gallagher also admits that he was under the influence of illegal substances when he wrote the song and to this day he claims he does not know what it means.
Live performances.
The song became a favourite at Oasis's live performances. Noel Gallagher encouraged the crowd to sing along and often kept quiet during the first chorus