What do you understand by mergers acquisitions?

As one can say that its a big deal,,means what you will have to do while u are seller or a buyer,, or going to open a business,,you can say its a biggest business deal in one life,,so one will have to be very careful about making a decision.. just keep your mind cool and calm on every point so you can judge the things from more insight,, the main thing should be the management how your management is,,see your seller and buyer make a good choice do not make random decision,,in short from the start till the end all of the steps will have to be taken carefully and wisely,,