A site that was getting traffic and suddenly isn't looks the same from the outside. Behind the scenes the cause is almost always one of three things, and they demand completely different responses: a manual penalty (Google removed you by hand), an algorithm update (the rules changed for everyone), or a technical fault (the site stopped being crawlable or fast). Treat the wrong one and you will chase your tail — re-write content while a blocking noindex sits in your headers, or beg Google for a reconsideration nobody issued. The first step is reading the room correctly.
Check these first, yourself
Open Google Search Console and go to Security & Manual Actions. A red manual action is the only place Google itself tells you it penalised you — and it always names the reason.
Compare the exact date traffic dropped against Google's official core updates list. If your drop lines up with one, it was the algorithm, not a mistake on your site.
Run `site:yourdomain.com` and open a handful of your top pages. If pages return 404, noindex, or canonical drift, it is technical — no algorithm removes individual pages.
Check Search Console > Performance for the pages and queries that lost traffic. A drop only on specific pages points to those pages; a drop everywhere points to the whole site, which demands a different checklist.
Should you fix it yourself or call a rescue?
Still have questions?
How do I know if it was an algorithm update?
Check the date. If traffic dropped within days of a confirmed core update and there is no manual action in Search Console, it was the algorithm — the fix is usually waiting it out and strengthening content, not quick changes.
What if some pages dropped but not others?
That points to the individual pages or the queries feeding them — a changed redirect — Automatically sending a visitor from one URL to another; broken loops tank both pages and rankings., a removed internal link, even a page that went slow. Section-by-section drops are rarely a site-wide penalty.
Can a technical problem look like a penalty?
Yes, and it is the most common mix-up. A noindex tag, a wasted robots.txt, or a site that got 10x slower makes Google drop pages by itself, with no manual action anywhere. That is the case to catch early.