In 2014, there was a video on YouTube about “7 blue ticks” on WhatsApp.
Due to WhatsApp's controversial decision to add the read receipt (2 blue ticks) feature in 2014, someone reacted by creating a parody with 7 blue ticks (✓✓✓✓✓✓✓) instead of 2 blue ticks, and those had some funny meanings.
As far as I can remember, after that, there came two red ticks (“✓✓”) that also had some funny meanings.
I can no longer find that video, and I don't know who created it.