Explain how iframes impact performance and SEO.?

Performance:

• Iframes load as separate browsing contexts, adding extra network requests and

increasing page load time.

SEO:

• Content inside iframes isn’t fully indexed by search engines.
• Links and text inside may not count toward the parent page’s SEO.

Best Practice:

• Use iframes only when necessary (e.g., embedding maps or videos).
• Add title attributes for accessibility.

Example:

<iframe src="

title="Location

Map"></iframe>

Key Takeaway:

Iframes isolate content — great for embedding, but can slow pages and weaken SEO.

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CSS Interview Questions