Question: Adding inline CSS dimensions to images, videos, and gifs helps improve which Core Web Vital?
- Largest Contentful Paint
- First Input Delay
- Cumulative Layout Shift
- It does not help improve any of the Core Web Vitals.
Explanation
Adding inline CSS dimensions to images, videos, and GIFs reserves the space they will occupy, preventing unexpected shifts as content loads. This directly reduces Cumulative Layout Shift (CLS), improving the visual stability of the page. Properly sized elements enhance user experience and support Page Experience signals. Reducing CLS contributes to better SEO performance and engagement metrics.
Why the other options are incorrect
A) LCP measures load time of the largest element, not layout stability.
B) FID measures interactivity delay, not layout shifts.
D) Setting dimensions does affect CLS, so this is incorrect.
Source for verification
HubSpot Academy: Core Web Vitals and Page Experience
The answer(s) to the question is highlighted in the BOLD text above. You can also find more questions and answers related to the exams on the "HubSpot SEO II" page.