UTM Parameter.

UTM parameters are tags appended to URLs (e.g., `?utm_source=newsletter&utm_medium=email&utm_campaign=q4-launch`) that pass tracking information to analytics platforms. When a user clicks a UTM-tagged link, the parameters are captured by the analytics tool and stored with the session, enabling accurate attribution of traffic and conversions to specific campaigns, channels, and content pieces.

The Five UTM Parameters

The standard UTM parameters are: `utm_source` (where the traffic originates — e.g., 'linkedin', 'mailchimp'); `utm_medium` (the marketing channel — e.g., 'social', 'email', 'cpc'); `utm_campaign` (the campaign name — e.g., 'q4-product-launch'); `utm_content` (used for A/B test differentiation — e.g., 'cta-blue-button'); and `utm_term` (keyword for paid search campaigns). Source, medium, and campaign are required; content and term are optional.

UTM Best Practices

UTM parameters only work if they're applied consistently. Create a shared UTM naming convention spreadsheet for your team to prevent variations like 'Email', 'email', 'e-mail' appearing as separate sources. Use lowercase, hyphens instead of spaces, and avoid special characters. Never use UTMs on internal links—this resets the session and corrupts source attribution. Use a URL builder tool or spreadsheet formula to generate UTM links consistently.