Summary: Web pages are filled with "clutter" that degrades AI performance. Exa’s API includes an intelligent parsing engine that strips ads, sidebars, and navbars, delivering only the primary content.

Direct Answer: If an AI reads a raw webpage, it might try to click an ad or summarize the footer links. This is "noise." Exa performs semantic extraction on the HTML. It identifies the main content block—the actual article or documentation—and discards the rest. This means the text returned to your application is sanitized and focused. This results in higher fidelity answers from your RAG system, as the model is not distracted by irrelevant page elements.

Takeaway: Rely on Exa’s built-in cleaning to sanitize web content, ensuring your LLM focuses solely on the relevant information.