Checking if a visitor is a googlebot
107226
how to tell if a web request is coming from google's crawler?
40216
Searching for Google contacts not in Groups
13099
Can you use googleon and googleoff comments to prevent Googlebot from indexing part of a page?
122893
Should I notify 'under construction' websites to crawlers? If yes how?
109071
Have Chrome autodetect language before spelling checking?
30409
Prevent malicious bots from posting spam
29624
Preventing robots from crawling specific part of a page
91094
Inspect the referrer in PHP
42797
JavaScript: How to find out if the user browser is Chrome?
19983
How does one check what websites a person logs into using their Google account?
62957
Display Google Keywords that brought a user to the site
129587
Checking if a domain name is registered
152077
How to code an automated bot that can browse and do operations on a webpage
24173
Why do Google search results include pages disallowed in robots.txt?
6251
How to find out which app is trying to open spam websites?
22293
Can a machine be taught to flag spam automatically?
141598
Compare referrer domains over time in Google Analytics without an "all traffic" line?