The statement is true.

Explanation:
A marketing plan is a comprehensive document that outlines an organization's marketing objectives, strategies, and activities. It serves as a guideline for the marketing team to follow in order to achieve the desired marketing goals.

Key Points:
- Marketing Objectives: The marketing plan clearly defines the objectives that the organization wants to achieve through its marketing efforts. These objectives can include increasing sales, expanding market share, launching new products, or building brand awareness.
- Marketing Strategies: The marketing plan outlines the strategies that will be used to achieve the marketing objectives. These strategies can include market segmentation, targeting specific customer groups, positioning the product or service in the market, and creating a competitive advantage.
- Marketing Activities: The marketing plan details the specific activities that will be undertaken to implement the marketing strategies. These activities can include advertising campaigns, social media marketing, public relations, direct marketing, and sales promotions.

Importance of a Marketing Plan:
- Guidance: A marketing plan provides a roadmap for the marketing team, ensuring that everyone is aligned and working towards the same objectives.
- Efficiency: By having a well-defined plan, resources can be allocated effectively, and activities can be prioritized to achieve the best results.
- Measurability: With a marketing plan in place, it becomes easier to track and measure the success of marketing efforts against the defined objectives.
- Flexibility: A marketing plan allows for adjustments and adaptations based on market conditions, customer feedback, and competitive landscape.

Conclusion:
In summary, the marketing plan is indeed a guideline that outlines the marketing objectives, strategies, and activities to be followed by an enterprise. It provides direction, ensures efficiency, and allows for measurement and flexibility in the marketing efforts.