What is Crawling?

What Is Crawling?

Crawling is the first step in how search engines find and read your web pages — automated bots visit URLs, follow links, and download page content for processing.

Before Google can rank your page, it has to find it. That’s crawling. Google’s bot (called Googlebot) systematically visits URLs across the web, reads the HTML, follows links to discover new pages, and sends everything back to Google’s servers for indexing.

Google crawls hundreds of billions of pages. But here’s the thing — it doesn’t crawl every page equally. Some pages get visited multiple times a day. Others wait weeks. The frequency depends on your site’s authority, how often you publish new content, and your crawl budget.

Why Does Crawling Matter?

If Google can’t crawl your page, it can’t index it. If it can’t index it, you won’t rank. Period.

• Discovery is the foundation — No crawling means no organic traffic, regardless of how good your content is
• New pages need to be found — When you publish a blog post, it doesn’t appear in search results until Googlebot crawls and indexes it
• Crawl errors kill visibility — A 2023 Semrush study found that 42% of websites have crawlability issues affecting their rankings
• Wasted crawl budget hurts large sites — If Googlebot spends time on low-value pages (filters, duplicates, outdated content), your important pages get crawled less often

Small business owners often don’t realize their pages aren’t being crawled at all. A broken robots.txt file or a stray noindex tag can make entire sections of your site invisible to Google.

How Crawling Works

Think of Googlebot as a librarian with infinite stamina but limited time. It visits websites, reads pages, follows links, and reports back. Here’s the process.

Discovery

Googlebot starts with a list of known URLs — from previous crawls, from your XML sitemap, and from links on other websites pointing to yours. Every backlink is essentially a recommendation: “Hey, check this page out.”

Fetching

Once Googlebot arrives at a URL, it downloads the page’s HTML content. It reads the text, headings, images, and structured data. If the page uses JavaScript for rendering, Googlebot may need a second pass to process it (which is why JavaScript SEO is its own discipline).

Link Following

After reading a page, Googlebot extracts all the links on it and adds unfollowed ones to its crawl queue. Internal links are especially important here — they’re how Googlebot discovers pages deeper in your site structure.

Crawl Scheduling

Not every page gets the same attention. Googlebot prioritizes pages that change frequently, have high authority, or receive lots of external links. Pages that haven’t changed in months get crawled less often. This prioritization is what people mean by crawl budget.

Types of Crawling

Search engines use different crawling approaches depending on the situation:

• Full crawl — The bot crawls your entire site from scratch. This typically happens when Google first discovers your domain or after a major site restructure.
• Partial/incremental crawl — Googlebot revisits only pages that have changed or are likely to have changed. This is the normal, ongoing crawling pattern for established sites.
• Fresh crawl — A lightweight crawl focused on recently updated or newly published content. News sites and blogs with frequent publishing get fresh crawls more often.
• Deep crawl — Bots follow links deep into your site architecture to find pages that aren’t linked prominently. Proper site architecture helps with this.

Most small-to-medium sites don’t need to worry about crawl types. But if you’re publishing frequently — say, 30 articles a month — making sure Googlebot can efficiently find and access all that new content matters.

Crawling Examples

Example 1: A dentist’s new service page A dental practice adds a “teeth whitening” page but doesn’t link to it from the main navigation or any existing page. Googlebot has no way to discover it. Three weeks later, the page still isn’t in Google. Adding an internal link from the services page and submitting the URL in Google Search Console gets it crawled within 48 hours.

Example 2: An ecommerce site wasting crawl budget An online store has 50,000 product pages but also 200,000 faceted navigation URLs (color + size + brand combinations). Googlebot spends most of its time crawling filter pages nobody searches for. Blocking faceted URLs in robots.txt frees up crawl budget for the actual product pages that drive revenue.

Example 3: A blog publishing with theStacc A roofing company uses theStacc to publish 30 blog posts per month. Each post is automatically submitted to Google via an XML sitemap and interlinked with existing content. Googlebot discovers and indexes new posts within days, not weeks — because the crawling fundamentals are handled automatically.

Crawling vs. Indexing

People mix these up constantly. They’re related but different.

	Crawling	Indexing
What happens	Googlebot visits and reads the page	Google stores and organizes the page in its database
Analogy	A librarian picking up a book	The librarian deciding where to shelve it
Can fail independently	Yes — a page can be crawled but not indexed	Yes — a page must be crawled before it can be indexed
You control it with	robots.txt, crawl rate settings	noindex tags, canonical URLs
Common problem	Blocked by robots.txt	”Crawled — currently not indexed” in GSC

A page that’s crawled but not indexed means Google found it, read it, and decided it wasn’t worth including. That’s a content quality signal, not a crawling problem.

Crawling Best Practices

• Submit an XML sitemap — Give Googlebot a roadmap. List your important pages in an XML sitemap and submit it through Google Search Console. Update it whenever you add or remove pages.
• Fix crawl errors fast — Check Google Search Console’s crawl stats and coverage report monthly. Crawl errors like 404s and server errors waste budget and block discovery.
• Build a strong internal linking structure — Every important page should be reachable within 3 clicks from your homepage. Orphan pages — pages with no internal links pointing to them — are nearly invisible to crawlers.
• Don’t block important pages in robots.txt — This sounds obvious, but it happens more than you’d think. Audit your robots.txt file quarterly.
• Publish fresh content consistently — Sites that update regularly get crawled more frequently. theStacc publishes 30 articles per month to your site automatically, which signals to Googlebot that your site is active and worth revisiting often.

Frequently Asked Questions

How long does Google take to crawl a new page?

Most new pages on established sites get crawled within 4 days to 2 weeks. Submitting the URL through Google Search Console’s URL Inspection tool can speed this up. Brand new domains take longer — sometimes 4-6 weeks for the first crawl.

Can I force Google to crawl my site?

You can’t force it, but you can request it. Use Google Search Console’s “Request Indexing” feature for individual URLs. Submitting an updated sitemap also helps. High-authority sites with strong backlink profiles get crawled more frequently by default.

What’s the difference between crawling and rendering?

Crawling is downloading the page’s raw HTML. Rendering is executing the JavaScript to see the final content. Googlebot does both, but rendering happens later and costs more resources. Pages that rely heavily on JavaScript may have delayed indexing.

Does crawling affect my server?

Googlebot is designed not to overload servers. But on small hosting plans, aggressive crawling during peak hours can slow your site. You can adjust Googlebot’s crawl rate in Google Search Console if this becomes an issue.

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Sources

• Google Search Central: How Search Works
• Google Search Central: Googlebot Overview
• Google Search Central: Manage Your Crawl Budget
• Semrush: Site Audit Study 2023
• Moz: Beginner’s Guide to SEO — Crawling & Indexing