Market analysis before product launch
Things change, always. Markets change; customer perception changes, the nature of competition changes and hence, to survive, one has to remain updated...about everything in the market.
In an ever-changing market, ample research helps comprehend the attitude and buying behaviour of consumers; with so many brands around, the consumers will always be choosy about products.
For success in the market, companies need to do research, try to check changing market trends and explore market potential and customer perception/public opinion etc.
Without evaluating such factors, one may not be able to understand the effectiveness of one's advertising or marketing campaigns for a specific market segment.