Rocket Validator looks for accesibility violations on your pages using the axe-core accessibility engine, hosted on our own servers and integrated into our web crawler. You don't need to buy an additional license, everything's already included in your Pro account at Rocket Validator.
WCAG: Best Practice: Frames must have a unique title attribute
iframeelements in the document must have a unique title to describe their contents to screen reader users.
Screen reader users rely on a frame title to describe the contents of the
frame. Navigating through frames and iframes can quickly become difficult and confusing for users of this technology if the frames are not marked with a