How can a business buy bitcoin?

Could you elaborate on the process of how a business can acquire Bitcoin? Specifically, what steps should they take to ensure a secure and efficient purchase? Are there any specific platforms or exchanges that cater specifically to businesses looking to invest in Bitcoin? Additionally, what are some of the key considerations businesses should make before making such a purchase, such as the potential risks and volatility of the cryptocurrency market? Understanding the process and considerations involved would be invaluable for any business looking to explore this investment opportunity.