Written by Graham Hill, Hosting Manager & Director at EzyWeb
More than half of all traffic hitting your website right now isn’t human. According to the 2026 Thales/Imperva Bad Bot Report, bots accounted for 53% of global web traffic in 2025, up from 51% the year before — and human traffic keeps shrinking as a share of the total. If you own or manage a website, understanding what these bots are, what they’re doing on your site, and which ones you actually want around is no longer optional. It’s part of running a healthy, secure, fast website.
What Is a Web Bot?
A web bot (short for “robot”) is a software program that runs automated tasks over the internet, usually by visiting websites and interacting with them the way a person would — except much faster, and constantly. Bots load pages, follow links, submit forms, read content, and call APIs, all without a human sitting at a keyboard.
Not every bot is a program someone built to cause trouble. Bots are simply automation, and automation cuts both ways. Some bots exist to help your website get discovered and function properly. Others exist to steal from it, slow it down, or attack it. The trick is knowing which is which — and building your site so it can tell the difference too.
What Do Bots Actually Do?
Depending on how they’re built, bots can:
- Crawl and index pages — reading your content so search engines can rank it
- Monitor uptime and performance — checking that your site is online and loading correctly
- Scrape content and prices — copying text, images, or product data, sometimes legitimately, sometimes not
- Fill in and submit forms — for anything from newsletter signups to spam comments
- Test login credentials — trying stolen username/password combinations at scale
- Generate fake clicks or traffic — inflating ad views or skewing your analytics
- Query your APIs directly — increasingly common as AI tools and agents interact with websites programmatically rather than through a browser
That last point is a growing trend worth noting: the 2026 Bad Bot Report found that 27% of bot attacks now target APIs directly, bypassing the normal website interface altogether. Bots aren’t just browsing your site anymore — some are reaching straight into its backend.
Good Bots: The Ones Doing Your Website a Favor
Good bots generally identify themselves honestly, respect the rules your site sets out (like your robots.txt file), and exist to help either you or your visitors. Common examples include:
- Search engine crawlers — Googlebot, Bingbot, and similar bots that index your pages so people can find you in search results
- AI retrieval bots — tools like ChatGPT-User or Perplexity-User that fetch live content so AI assistants can answer questions using your site’s information
- Social preview bots — used by Facebook, LinkedIn, and other platforms to generate the preview card when someone shares your link
- Monitoring and uptime bots — services that ping your site to confirm it’s online and alert you when it isn’t
Without these, your site would be invisible to search engines, awkward to share, and harder to keep an eye on. You want these bots visiting.
Bad Bots: The Ones You Need to Watch For
Bad bots are built to exploit rather than assist. They often disguise themselves as legitimate traffic, ignore the rules in your robots.txt file, and can quietly cost you money, data, or search ranking. Common types include:
- Credential stuffing bots — automated tools that test stolen username/password pairs against your login page, hoping for a match. The 2026 report found bots are behind 46% of account takeover incidents in the financial sector alone, and the pattern extends across other industries too
- Aggressive scrapers — bots that copy your entire site’s content, pricing, or product catalog, sometimes to resell, undercut, or republish it elsewhere
- Spam bots — bots that flood contact forms, comment sections, and signup fields with junk or malicious links
- Inventory and scalper bots — bots that snap up limited stock or booking slots faster than any human could
- Fake crawlers — bots that impersonate Googlebot or other trusted crawlers to slip past basic defenses
- DDoS and traffic-flood bots — bots that overwhelm your server with requests until it slows down or crashes entirely
Even bots that aren’t outright malicious can still hurt you. Heavy, unthrottled crawling from a low-value bot — an aggressive SEO tool or a poorly built AI data-collection crawler, for instance — can chew through your server resources and slow the site down for real visitors, without ever “attacking” anything on purpose.
What to Consider for Website Security and Performance
You don’t need to block every bot — you need to manage them. A few practical things worth putting in place:
Set clear rules with robots.txt. This file tells well-behaved bots which parts of your site they’re allowed to crawl and how often. It won’t stop malicious bots (they ignore it by design), but it keeps legitimate crawlers from overloading pages they don’t need to hit.
Use a Web Application Firewall (WAF). A WAF filters incoming traffic before it reaches your site, blocking known malicious bot patterns, suspicious request rates, and common attack signatures.
Apply rate limiting. Capping how many requests a single visitor (or bot) can make in a given time window protects your server from being overwhelmed and slows down scraping and credential-stuffing attempts.
Keep software and plugins updated. Many bad bots specifically search for outdated CMS versions, plugins, or themes with known vulnerabilities. Regular updates close those doors.
Use CAPTCHA or bot-detection tools where it matters. Login pages, checkout flows, and contact forms are common bot targets — lightweight verification at these points can filter out automated abuse without frustrating real users.
Monitor your traffic. Keep an eye on server logs and analytics for unusual spikes, repeated failed logins, or traffic from unexpected sources. Catching unusual bot activity early is far easier than cleaning up after it.
Choose hosting built to handle it. Server-level protections — firewalls, DDoS mitigation, and resource isolation — matter just as much as anything you configure on the site itself. A hosting environment that can absorb and filter bot traffic keeps your site fast for the humans who actually matter.
The Bottom Line
Bots aren’t going away — if anything, with AI agents now browsing and transacting on the web, there are more of them than ever. The goal isn’t to eliminate bot traffic; it’s to welcome the bots that help your site while keeping out the ones that don’t. That balance comes down to smart configuration, the right security tools, and hosting infrastructure that’s built with this reality in mind.
If you’re not sure how well your current setup handles bot traffic — or your site could use hosting that takes security seriously from the ground up — it’s worth a conversation.
Frequently Asked Questions
What’s the difference between a bot and a web crawler? A crawler is just one type of bot — specifically, one built to systematically browse and index web pages (like Googlebot). “Bot” is the broader term for any automated program, which also covers things like monitoring tools, chat bots, and malicious scripts that never “crawl” in the traditional sense.
Is all bot traffic bad for my website? No. Search engine crawlers, AI retrieval bots, uptime monitors, and social preview bots all serve a purpose and are generally worth allowing. The goal isn’t to block bots altogether — it’s to let the helpful ones through while filtering out the ones designed to scrape, spam, or attack your site.
How do I know if bots are hurting my website’s performance? Common warning signs include unusual traffic spikes that don’t convert into real engagement, slower load times without a clear cause, repeated failed login attempts, spam submissions through your contact forms, or unexplained jumps in server resource usage. Your hosting analytics or server logs are the first place to check.
Can robots.txt stop bad bots? Not on its own. Robots.txt is a set of instructions that well-behaved bots choose to follow — it works well for managing legitimate crawlers, but malicious bots are built to ignore it. Stopping bad bots typically requires a WAF, rate limiting, or dedicated bot-detection tools alongside your robots.txt file.
Should I block AI bots like GPTBot from crawling my site? That depends on your goals. Blocking AI crawlers keeps your content out of AI training data and some AI-generated answers, but it can also mean missing out on visibility as more people search through AI assistants instead of traditional search engines. Many site owners choose to allow AI retrieval bots (which fetch content to answer a live query) while blocking AI training crawlers — you can set this distinction in robots.txt.
Will blocking bots hurt my SEO? Blocking the wrong bots can. If you accidentally block Googlebot or Bingbot, your pages can stop appearing in search results. That’s why it’s important to allow known, verified search engine crawlers explicitly and target your blocking rules at bots that show malicious or resource-draining behavior, not crawlers in general.
Do small businesses actually need bot protection, or is that just for big sites? Small business sites are targeted too — often because they’re seen as easier targets with fewer defenses in place. Credential stuffing, spam bots, and scrapers don’t discriminate by company size; they run at scale looking for any site that’s vulnerable.
How can better hosting help with bot traffic? Good hosting adds a layer of protection you don’t have to configure yourself — things like network-level firewalls, DDoS mitigation, and traffic filtering that catch a lot of bad bot activity before it ever reaches your website’s code. It won’t replace site-level measures like CAPTCHA or login protection, but it takes a meaningful load off your plate.
