Overview
Windows-1252 or CP-1252 (code page 1252) is a single-byte character encoding of the Latin alphabet that was used by default in Microsoft Windows for English and many Romance and Germanic languages including Spanish, Portuguese, French, and German (though missing uppercase ẞ). This character-encoding scheme is used throughout the Americas, Western Europe, Oceania, and much of Africa.
It is the most-used single-byte character encoding in the world. , 1.4% of all web sites declare ISO 8859-1 which is treated as Windows-1252 by all modern browsers (as demanded by the HTML5 standard), plus 0.3% of all websites declared use of Windows-1252, for a total of 1.7% (and only 16 of the top 1000 websites). Pages declared as ASCII, or a missing or invalid charset, are also assumed to be Windows-1252 by browsers.
Depending on the country or language, use can be much higher than the global average, e.g., for Brazil website use is at 9.2%, and in Germany at 3.9% (these are the sums of ISO-8859-1 and CP1252 declarations).
Windows-1252 is often assumed to be the encoding of text in operating systems, in particular on Microsoft Windows; this is only gradually being changed to UTF-8.
From Wikipedia (CC BY-SA 4.0).