Most readers should be familiar with the entry of near-English identifiers, more formally referred to as Uniform Resource Locators (URLs), into a browser to access a particular Web page.
What exactly do they mean by that?
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I read that as almost English but it could be almost any language.
Without these almost lanugage identifiers, we'd have to type http://18.104.22.168 to visit Google.
I'd never heard the term before this question though, so I wouldn't think it very widespread.
The clue is in the context, where it says
more formally referred to as Uniform Resource Locators (URLs)
a URL looks like this: