User acquisition refers to the process of attracting new users to a product or service, while user retention refers to the process of keeping existing users engaged and using the product or service over time.

Acquisition strategies can include Paid advertising, SEO, Content marketing, Influencer marketing, Referral marketing and Public relations (PR)

Retention strategies can include Personalization, Consistently updating and improving the product or service, Providing excellent customer service, Building a strong brand and community and Offering loyalty programs or rewards

Both acquisition and retention are important for the growth and success of a business, as acquiring new users can bring in revenue, but retaining existing users can lead to more consistent and long-term revenue.