Market research is a type of a research technique that allows you to find information of what's in the market and whats popular in the media etc.. For example if you were to start a new magazine you'd need to use market research into finding which magazines are popular and unpopular, what type of magazines are out in the market at the moment. For example celebrity gossip magazines are popular so if you were to make a new one it would have lots of competition which might be difficult to sell. The same would be for men's fitness magazines there's plenty in the market at the minute so creating one of the same genre would not be a good idea.
Their's a term used 'Gap in the market' which is quite self explanatory really, the market has opening for an idea or for example a magazine/radio show etc..
