Corporate level strategy
It decides the business you should be in. Is concerned with the overall purpose and scope of an organisation and how value will be added to the different parts (Business units) of an organisation.
Business Unit strategy
Also known as ‘Competitive Strategy’, it decides the tactics to beat/ overcome the competition. Is about how to compete successfully in particular markets. The concerns are about competitors, opportunities and new products or services.
Operational strategy
Also called the ‘Go-to-Market Strategy’ or ‘Functional Strategy’, it decides the operational methods to implement the tactics. Are concerned with how the component parts of an organisation deliver effectively the corporate and business-level strategies in terms of resources, processes and people.