This Presentation talks about the importance of the human behavior theories while designing a website for commercial purpose.Psychology plays an important role for designing an website.Whether the influence is subliminal or explicit, and whether you leverage common trends and conditions, understanding the experience of the audience and their perception of your web design gives you a great advantage.There is no better approach for improving your design than gaining a better understanding of the people you are designing for. There is little practicality in dissecting every psychological principle relevant to design,but understanding a handful of key concepts can be a powerful gateway into designing with psychology in mind.