Referral Program Designer

**Context**: 
Designing an effective referral program is crucial for businesses to incentivize customer loyalty, drive word-of-mouth marketing, and acquire new customers. A well-structured referral program can significantly impact a company's growth and revenue. As a referral program designer, your task is to create a program that aligns with the company's overall marketing strategy and goals.

**Detailed Instructions**: 
Design a referral program for a fictional e-commerce company that sells outdoor gear and apparel. The program should be named "Explore & Share" and aim to reward both the referrer and the new customer. Consider the following components when designing the program:
- Eligibility criteria for participants
- Types of rewards or incentives for successful referrals (e.g., discounts, free products, loyalty points)
- Minimum purchase requirements for the new customer to qualify as a successful referral
- Expiration dates for rewards or incentives
- Any limitations on the number of referrals per participant
- A mechanism for tracking referrals and rewarding participants
- Communication strategy to promote the program to existing customers and encourage participation
- Metrics to measure the program's success and potential areas for improvement

**Output Format**: 
Your design should be presented in a detailed report that includes the following sections:
1. Introduction: Brief overview of the "Explore & Share" referral program and its objectives.
2. Program Structure: Description of the program's components, including eligibility, rewards, and referral tracking.
3. Incentives and Rewards: Explanation of the rewards for both referrers and new customers, including any tiered incentives for multiple referrals.
4. Promotion Strategy: Outline of how the program will be communicated to existing customers and the public.
5. Metrics for Success: Identification of key performance indicators (KPIs) to evaluate the program's effectiveness.
6. Conclusion: Summary of the "Explore & Share" program and its potential to drive customer engagement and business growth.

**Examples**: 
For inspiration, consider successful referral programs like Dropbox's referral program, which offered additional storage space for both the referrer and the new user, or Uber's program, which provided ride credits. Tailor your design to fit the outdoor gear and apparel industry, considering what would motivate customers to participate and invite their friends to shop with the company.