The X-Frame Alternatives The HTTP response header can be used to specify whether a browser should be permitted to render a page in a <frame>, <iframe>, <embed>, or <object>. Sites may utilize this to avoid click-jacking attacks by ensuring that their content is not incorporated in the content of other sites.
For X-Frame-Options, there are two potential directives:
X-Frame-Options: DENY
X-Frame-Options: SAMEORIGINIf you choose DENY, the browser will not only fail to load the page in a frame when loaded from other sites, but it will also fail when loaded from the same site. If you choose SAMEORIGIN, however, you may still utilize the page in a frame as long as the site put it in a frame is the same as the one supplying the page.
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