GLOSSARY
Search Marketing FAQ
Concise answers to the most common questions relevant to SEO, GEO, CRO, and PPC. Filter by discipline, platform, and topic. Cortex references its corpus of platform-published best practices to draft each answer, with citations linking back to the source documents.
Showing 1441-1464 of 1947 questions
How can third-party scripts hurt performance, and how do I control them?SEOPage Speed / Core Web VitalsPrivacy & Cookies+
Five impacts. Block main thread (chat widgets, analytics). Pull in additional resources (cookie consent banners load extra scripts). Inject layout shifts (CLS). Add network requests to third-party domains. Block FCP if loaded synchronously. Control with: async/defer attributes, tag manager governance, conditional loading (load chat only on contact page), preconnect to third-party origins.
in Delivery, Caching & Monitoring
What tools should I use to test and monitor web performance?SEOPage Speed / Core Web VitalsAnalytics & TrackingImage Optimization+
Five tools. PageSpeed Insights for one-off audits (lab + field). Lighthouse CLI for batch audits and CI integration. Chrome DevTools Performance tab for deep diagnostics. WebPageTest for filmstrip and waterfall analysis. CrUX BigQuery dataset for historical field data trends. Real User Monitoring (RUM) tools like Vercel Speed Insights or Cloudflare Web Analytics for continuous tracking.
in Delivery, Caching & Monitoring
What is Conversion Rate Optimization (CRO)?CROUX Research+
CRO is the systematic process of increasing the percentage of website visitors who complete a desired action - purchase, signup, lead form, download. Uses data-driven research (analytics + heatmaps + user research) to identify friction, hypothesizes fixes, tests via A/B experiments, and rolls out winners. Distinguishes from UX (broader) and growth marketing (acquisition focus).
in CRO Fundamentals
What does conversion mean in CRO?CRO+
Conversion is any predefined valuable action a visitor takes on your site. Macro conversion: the primary business goal (purchase, signup, demo request). Micro conversion: a step toward the macro (email signup, add-to-cart, video view, blog read). Define conversions explicitly per page goal - 'conversion' without specification is meaningless.
in CRO Fundamentals
How is conversion rate calculated?CROReporting & KPIs+
Conversion rate = (conversions / sessions) × 100. Example: 50 purchases from 5,000 sessions = 1% conversion rate. Define the denominator carefully - sessions vs unique users vs page views all yield different rates. Use sessions for top-of-funnel; users for retention metrics. Always specify the denominator when reporting.
in CRO Fundamentals
Why is CRO important for a business?CRO+
Three reasons. Improves revenue per visitor without increasing traffic costs. Multiplies the ROI of all paid acquisition (a 20% CRO lift = 20% lower CPA on the same ad spend). Reveals UX friction that compounds across channels. CRO has higher ROI than most marketing tactics because the audience is already on your site.
in CRO Fundamentals
What are the main goals of CRO?CRO+
Five goals. Increase macro conversion rate (purchases, signups). Improve revenue per visitor (RPV). Reduce friction at high-drop-off pages (checkout, lead forms). Identify and remove barriers (slow load, confusing nav, weak copy). Build a culture of testing where decisions are data-driven, not opinion-driven. CRO outcomes compound over months and years.
in CRO Fundamentals
What is the difference between CRO and UX?CRO+
UX is the broad discipline of user experience design across all interactions. CRO is a focused application: optimizing for specific conversion events. UX improvements often improve CRO; not every UX improvement is testable as a conversion lift. UX practitioners design holistically; CRO practitioners measure ruthlessly. Best teams treat them as complementary, not competing.
in CRO Fundamentals
What is the difference between CRO and A/B testing?CROA/B Testing & ExperimentationUX Research+
CRO is the strategy (improve conversion rates through systematic optimization). A/B testing is one tactic within CRO (compare two variants to find the better one). CRO also includes qualitative research (user interviews, session recordings), heuristic analysis, copy testing, design audits. A/B testing without CRO strategy produces random tests; CRO without A/B testing is just opinion.
in CRO Fundamentals
What are micro conversions?CRO+
Smaller actions that indicate progress toward the macro goal. Examples: email signup, add-to-cart, blog read past 50%, pricing page view, video completion. Track micro conversions because the macro is often too sparse for meaningful testing - 1% purchase rate vs 30% add-to-cart rate gives 30x more data for analysis. Micros are diagnostic, macros are revenue.
in CRO Fundamentals
What are macro conversions?CRO+
The primary business goals you're optimizing for. Examples: completed purchase, signed-up customer, qualified lead form, demo booked, subscription started. Each business has 1-3 macros tied to revenue. Macros are what counts for business outcomes; micros help diagnose macro performance. CRO programs should always measure macro conversions even when testing micro changes.
in CRO Fundamentals
What is the difference between micro and macro conversions?CRO+
Macro: the primary revenue-generating action (purchase, signup). Micro: a precursor or signal toward the macro (add to cart, email signup, page view, video play). One purchase might require 100 micro conversions across the funnel. Track both - macros measure outcomes, micros diagnose where in the funnel users drop off.
in CRO Fundamentals
Why should I track micro conversions?CROPage Speed / Core Web VitalsA/B Testing & Experimentation+
Three reasons. Macro events are sparse (1-5% of sessions); micros are frequent (20-60% of sessions) - giving 10-50x more data for analysis. Pinpoints exact funnel stages where drop-offs happen. Enables faster A/B test conclusions when testing top-of-funnel changes. Microconversions are diagnostic; without them, you only see the final outcome, not the path.
in CRO Fundamentals
Which conversion should be considered the primary conversion?CRO+
The one closest to revenue. E-commerce: completed purchase. SaaS: paid signup or qualified trial start. Lead gen: marketing-qualified lead (MQL) submission. Match primary conversion to business model and stage. Avoid making 'page view' or 'time on site' your primary - those are engagement metrics, not conversions. Primary should map to revenue or revenue-predictive events.
in CRO Fundamentals
Why do I need to establish a baseline before testing?CRO+
To measure lift accurately and detect regressions. Without baseline, you can't know if a change worked. Baseline includes current conversion rate, traffic volume, revenue per visitor, segment performance (mobile vs desktop, organic vs paid). Capture 4-8 weeks of baseline data minimum before launching tests. Baseline also reveals seasonal patterns that inform test timing.
in CRO Fundamentals
How do I measure my current conversion rate?CROAnalytics & TrackingReporting & KPIs+
Three steps. Define what counts as a conversion. Count conversions over a defined timeframe (typically 28-90 days). Divide by sessions (or users) over the same period. Tools: GA4 (Conversions report), Shopify Analytics, your platform's built-in dashboard. Segment by device, channel, geography for meaningful baselines per audience. Track over time, not just snapshots.
in CRO Fundamentals
What is a conversion funnel?CROAnalytics & Tracking+
The sequence of steps users take from arrival to conversion. Example e-commerce funnel: landing → product page → add-to-cart → checkout start → payment → confirmation. Conversion rate at each step shows where users drop. Funnel analysis is the foundation of CRO research - reveals exact friction points worth testing. Build funnels in GA4 Exploration reports.
in CRO Fundamentals
What are the stages of a conversion funnel?CRO+
Five typical stages. Awareness: visitor lands. Interest: explores content. Consideration: views product/service detail. Action: initiates conversion flow (add to cart, start signup). Conversion: completes the macro. E-commerce extends with: cart, checkout, payment, confirmation. Each stage has its own conversion rate; bottlenecks are the highest-leverage CRO targets.
in CRO Fundamentals
How does the conversion funnel affect CRO?CRO+
Two ways. Diagnostic: shows which stages have the biggest drop-offs. Prioritization: focus testing where the leak is largest (a 2x improvement at the worst stage often outperforms a 10% improvement at a healthy stage). The funnel becomes the roadmap for testing. Without funnel awareness, CRO becomes random - testing what you guess instead of what you measure.
in CRO Fundamentals
Where do users usually drop off in the funnel?CROPage Speed / Core Web VitalsE-E-A-T / Trust SignalsLanding Pages+
Three common drop-off points. Landing page (slow load, confusing message, wrong audience). Cart/signup form (too long, friction in input, no trust signals). Payment/final step (cost transparency issues, no preferred payment method, decision fatigue). Each site's drop-off pattern is unique - the funnel analysis reveals yours specifically.
in CRO Fundamentals
What are the most common barriers to conversion?CROPage Speed / Core Web VitalsE-E-A-T / Trust SignalsAd CreativeUX Research+
Eight common. Slow page speed. Confusing or weak headline. Form too long. No social proof. Hidden costs revealed at checkout. No guest checkout. Trust signals missing. Mobile UX broken. The exact barriers depend on site, audience, and product. Diagnose with user research and session recordings, not assumption. Each barrier addressed is testable.
in CRO Fundamentals
What is the first step in a CRO process?CROAnalytics & TrackingConversion Tracking+
Audit current performance. Set up GA4 conversion tracking properly. Establish baselines per channel, device, page. Run heuristic UX review of top conversion paths. Watch 20+ session recordings on key pages. Interview 5+ customers about their journey. From this comes a prioritized backlog of testable hypotheses - never start CRO with a test idea, always with research.
in CRO Fundamentals
What data do I need before starting CRO?CROAnalytics & Tracking+
Six datasets. Analytics conversion data (GA4, platform native). Funnel analysis with drop-off rates per stage. Session recordings (Hotjar, FullStory, Microsoft Clarity). Heatmaps on top pages. Customer feedback (NPS, post-purchase surveys, support tickets). Competitor benchmarks. Without this, CRO becomes guess-and-test - expensive and slow.
in CRO Fundamentals
What is a CRO hypothesis?CRO+
A testable prediction about how a specific change will affect a specific metric, based on research. Format: 'If we [change], then [metric] will [direction] because [research-backed reason].' Example: 'If we add trust badges to checkout, completion rate will increase because session recordings show users hesitating at payment step.' Hypothesis-driven tests have higher signal.
in CRO Fundamentals