Advanced concepts in Growth & Experimentation
The Pivot: A Structured Change in Strategy, Not Vision
A pivot is a structured course correction, not a restart. You change strategy based on validated learning from your MVP when data shows your initial hypothesis was wrong. The footgun is pivoting on a whim instead of data, or failing to pivot despite it.
Customer Lifetime Value (LTV): A Customer's Future Net Profit
LTV predicts the total net profit a customer will generate over their entire relationship. It's used to set marketing budgets and prioritize features for high-value users.
RARRA Framework: Retention Over Acquisition
The RARRA framework flips the classic AARRR funnel, prioritizing Retention over Acquisition. In crowded markets, it's cheaper to keep a user than to find a new one. Use it when acquisition costs are high.
Identity Resolution: Stitching User Profiles Together
Identity resolution stitches together scattered user data into a single profile. It's like a detective matching a phone number from your CRM and a cookie from your website to the same person.
Attribution Modeling: Who Gets Credit for a Conversion?
Attribution modeling decides how to credit different marketing channels for a conversion. It's like splitting a sales commission: does the first call, the final meeting, or everyone involved get credit? The footgun is using a simplistic model like last-touch.
Schema-on-Read vs. Write: Pay for Structure Now or Later?
Schema-on-Write pays to structure data upfront for fast, consistent reads. Schema-on-Read defers this cost to query time for flexible ingestion. This choice underpins relational databases (write) vs. data lakes (read). The footgun is creating a data swamp.
Nudge Theory: Shaping Choices Without Forcing Them
Nudge theory influences behavior by subtly redesigning the environment where choices are made. It's used in product design to guide users toward desired actions, like setting smarter defaults.
Variable Rewards: The Engine of Habit
Variable rewards make products sticky by creating unpredictable payoffs, like a slot machine. This drives repeat actions in social feeds or games. The footgun is that overuse can feel manipulative and lead to user burnout or accusations of addictive design.
The IKEA Effect: Why We Overvalue What We Build
The IKEA effect is our tendency to overvalue things we help build. It's used in products that let users customize profiles or dashboards, increasing their investment. The footgun: if the task is too hard or fails, users feel incompetent and abandon it.
The Endowment Effect: We Overvalue What We Already Own
We irrationally value things more simply because we own them. This appears in free trials that create a sense of ownership, making users less likely to cancel. The footgun is assuming users judge value objectively; they don't, and will resist switching.
Minimum Detectable Effect: How Small a Change Can You See?
Minimum Detectable Effect (MDE) is the smallest change your A/B test can reliably see. You calculate it *before* a test to determine the sample size needed.
Bonferroni Correction: Raising the Bar for Significance
The Bonferroni correction prevents finding false positives when running many tests by making your significance threshold stricter for each one. It's used in A/B tests with multiple variants.
Programmatic Advertising: A Stock Exchange for Ads
Think of programmatic advertising as a stock exchange for ad impressions. It automates buying ad space via real-time auctions, letting you target specific users across the web. The main footgun is paying for fraudulent bot traffic or appearing on unsafe sites.
Demand-Side Platform (DSP): Your Ad-Buying Robot
A DSP is an automated bidding system for advertisers, like a stock trading bot but for ad space. It lets them buy impressions across many publisher sites from one interface, targeting users in real-time auctions.
Lookalike Audiences: Find More of Your Best Customers
Lookalike audiences find new customers by algorithmically modeling your best existing ones. Ad platforms like Facebook use your "seed" list of high-value users to find a much larger group of statistically similar people to target with ads.
Real-Time Bidding (RTB): An Instant Auction for Every Ad
RTB treats every ad slot like a stock trade. The moment a page loads, an auction runs in milliseconds for advertisers to bid on showing their ad to you. It's how hyper-targeted ads appear instantly across different websites.
Contextual Onboarding: Just-in-Time User Guidance
Contextual onboarding delivers guidance exactly when a user needs it, triggered by their actions. It introduces core features step-by-step as users explore, preventing overwhelm.
Personalized Onboarding: One Size Fits None
Personalized onboarding guides users based on their role or goal, not a generic script. It's key for apps with diverse user types, showing marketers and engineers different paths to value. The footgun is a one-size-fits-all tour that buries their "aha!"
Onboarding Gamification: Guiding Users with Game Mechanics
Onboarding gamification uses game-like elements to guide new users through key actions, turning a checklist into a challenge. It's used to boost activation by making initial setup feel rewarding, like earning a badge for completing your profile.
Negative Churn: When Losing Customers Still Means Growth
Negative churn means existing customers upgrade faster than others leave, growing your revenue even if you lose logos. It's a key SaaS metric for variable pricing models. The footgun: you can have negative revenue churn while still losing many customers.
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