People who direct someone to another person or service for help; websites that direct traffic to another site.
From Latin 'referre' meaning 'to carry back' or 'to report'. The word evolved through French 'référer' and entered English in the 14th century, gaining its modern technical sense with the development of web analytics.
In web analytics, referrers reveal the hidden pathways of internet browsing - how a random blog post can send thousands of visitors to an unexpected website. Some of the most valuable referrer traffic comes from obscure forums and social media conversations rather than major search engines.
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