A thick check mark / tick displayed on some platforms in a handwritten style. Generally displayed in black, except on Windows where it is displayed in green. Commonly used in lists to signify completed tasks or verification of a statement of fact.
Previously shown in red on Samsung and green on Google. Note: this emoji is not supported in Twitter names, to minimize confusion with a verified checkmark.
See also: ✅ Check Mark Button, ☑️ Check Box with Check.