The Google score runs a full simulation – a throttled phone, a fresh browser, JavaScript execution and render timing. Small run-to-run differences are unavoidable, which is why a swing from 68 to 78 is normal and happens on Google’s own tool too. It’s a diagnostic, not a fixed grade.
Score 90–100 (Green – Good): Your site is performing well. Re-run the website speed test after any significant plugin or theme update.
Score 50–89 (Orange – Needs Improvement): Your site has measurable performance issues that are affecting search rankings. Analyse TTFB score and take necessary actions
Score 0–49 (Red – Poor): Your site has serious problems that are harming rankings, causing visitor drop-off. If TTFB is also above 600ms, switching hosting is your highest-leverage fix
Your Mumbai TTFB is a direct measurement of your server’s response, taken three times with the middle value shown. If you re-test and see a different number, that’s not an error – the most common reason is caching. When your page is served from cache, the server answers fast. When the cache has expired, the server rebuilds the page from scratch – and that visitor waits much longer. Both speeds are real: some of your visitors get the fast one, some get the slow one.
How to find your real numbers: run the test 2–3 times over a few minutes.
Your lowest reading is your cached speed – the best case your hosting delivers. Under 400ms here means your infrastructure is fine.
Your highest reading is your uncached speed – what a visitor gets when the cache misses. If this is far above your lowest, caching is your fix, not a new host.
If even your lowest reading is slow (600ms+), caching can’t save it – your server itself is slow or far from India. A faster Indian host is the fix. And if readings swing wildly even without cache changes, that points to a “noisy neighbour” on an overloaded shared server – other sites eating your resources. Guaranteed-resource hosting (VPS, cloud, managed) fixes that.
Simple rule: low reading good but high reading bad → fix caching. Even the low reading bad → find a faster host. The two fixes below the results match exactly these two cases.