This is an excerpt from Wikipedia:
"The section sign (..), also known as the silcrow, is a typographical character used mainly to refer to a particular section of a document, such as a legal code. It is also called "double S" and "sectional symbol". (...) It is frequently used along with the pilcrow (¶), or paragraph sign. Like the dagger (†) and double dagger (‡), it is also sometimes used to link to a footnote where the asterisk (*) is already in use on a given page."
I mainly just know it from legal texts. It's used widely in European judicial systems, for example in the German Civil Code