It is not uncommon to use repeating design elements in a document. For instance, you may want all occurrences of a particular word to appear in bold italics, at a certain point size. While you can certainly do the formatting by hand, it is much more efficient to allow a macro to do the work for you. By handling the formatting in this way, you don't need to worry about remembering how the word should appear. This macro, FormatWords, is an example of such a macro.

Sub FormatWords()
   Selection.Find.ClearFormatting
   Selection.Find.Replacement.ClearFormatting
   With Selection.Find
        .Text = "Warning!"
        .Replacement.Text = ""
        .Replacement.Font.Bold = True
        .Replacement.Font.Italic = True
        .Forward = True
        .Wrap = wdFindContinue
        .MatchWholeWord = True
   End With
   Selection.Find.Execute Replace:=wdReplaceAll
End Sub

When you run this macro, it searches for all occurrences of the word Warning (followed by an exclamation point) and changes the formatting on it so the word is bold and italics.