What are some uses for find and replace?

Say, for example, you are writing a document and reference a character by the name of Ann, only to find out that Ann's name is actually spelled "Anne". Now, instead of tediously going through the entire document, finding each instance of "Ann" and changing it to "Anne" (with the possibility of missing an instance, leaving you with an inconsistent document), you can simply find all instances of "Ann" and replace with "Anne" and it will delete all cases of "Ann" and insert "Anne" in its place. The find and replace also goes beyond simple characters such as above, as it can apply to miscalculated numerical values.