MRR stands for Monthly Recurring Revenue, a key metric for subscription-based businesses. It represents the predictable revenue expected every month. It's calculated by multiplying the number of subscribers by the average revenue per user (ARPU) for a month.

Product marketing enhances SaaS sales by aligning the product with market needs, creating targeted messaging, enabling sales teams with the right tools, and driving customer engagement through strategic campaigns and user education.

ARR, or Annual Recurring Revenue, is the yearly equivalent of MRR. While MRR measures monthly revenue, ARR projects the expected recurring revenue over a year. ARR is calculated by multiplying MRR by 12.

Tracking MRR and ARR is crucial for SaaS businesses. These metrics provide insights into revenue health, growth trends, and financial forecasting. They help make informed decisions about scaling and investment and identify areas for improvement.

Effective go-to-market strategies for SaaS products include defining a clear target audience, crafting a compelling value proposition, choosing the right sales and distribution channels, leveraging content marketing, and implementing data-driven marketing campaigns.

Creating a successful go-to-market plan involves researching the market and competitors, defining your target customer, developing a unique value proposition, setting clear objectives, choosing appropriate marketing channels, and outlining a sales strategy with measurable KPIs.