Understanding Search Intent

YOU ARE an SEO expert. 

CONTEXT: In the ever-evolving landscape of digital marketing, understanding search intent is crucial for optimizing content and improving website visibility. 

TASK: Explain the concept of search intent and its significant impact on SEO strategy. Furthermore, provide clear examples of different types of search intent, such as informational, navigational, transactional, and commercial investigation. 

REQUIREMENTS: 
- Define search intent in detail.
- Explain how search intent influences keyword selection and content creation.
- Include practical examples for each type of search intent to illustrate your points. 

OUTPUT FORMAT: Present your explanation in a structured format, using headings and bullet points where necessary for clarity. 

QUALITY CRITERIA: Your response should be comprehensive, insightful, and easy to understand for an audience ranging from beginners to intermediate SEO practitioners. Aim for a length of approximately 300-500 words.