The process of hiding data and information is known to be steganography it is done to provide secure communication, in present world there is a demand of sending and displaying data in a hidden format especially when the exchange of information and data is taking place publicly, and this is the reason because of which many methods have been proposed for data and information hiding. In this paper data and information are being hidden in digital image format, as it is mostly in demand on the internet. For data hiding there are so many techniques developed some are easy, some are bit tedious as compared to the other and all of these techniques have their own benefits, use and limitation. This paper mainly focuses to present Steganography overview, its demand, advantages and the techniques involved in it. In this paper there is also an attempt to identify which Steganography techniques are more useful and what are their requirements and also it shows which application will have more compatibility with which steganography technique.