Pixel

Definition:
A pixel is a small piece of code embedded in a website to track user behavior, such as page visits, conversions, or custom events.

Why it matters:
Pixels allow advertisers to measure performance, build retargeting audiences, and optimize campaigns based on real behavior data.

Types of pixels:

• Conversion tracking (e.g., purchases, form fills)

• Retargeting (e.g., view content, add to cart)

• Event tracking (e.g., scroll, click)

Best practices:

• Verify installation using platform tools (e.g., Meta Pixel Helper)

• Avoid duplicate pixel firing

• Use server-side tagging when possible to increase reliability