As site designers, developers & owners we all have clients & editors who, even with the best of intentions, can make a hash job of editing a page or a post; for example, making a headline italic, and purple, and Papyrus (despite the site’s overall aesthetic of non-italic cobalt-blue Open Sans everywhere else); or the oft-seen act of making all of the text red & bold so that it all stands out all the time.
What StyleBidet does is subtly take back some of that design control to ensure that sites look the way they were intended to. Via the handy Settings panel, you can optionally set StyleBidet to:
style attributes when saving & displaying post content;<style> & <font> tags when saving & displaying content;<script> tags when saving & displaying content;style/font attributes & tags when saving & displaying Advanced Custom Fields.