Fraktur is the ornate blackletter style historically used in German printing and medieval manuscripts. Unicode preserved it as a dedicated character block, which this tool converts your text into.
Blackletter typefaces were the dominant printing style across much of Europe for centuries before being gradually replaced by the simpler Roman letterforms used today. Unicode's Fraktur block exists mainly to support historical and mathematical typesetting.
Capital C, H, I, R, and Z use separate older Unicode characters rather than following the same numbering as the rest of the block — a historical quirk in how the standard was built up over time.
Gothic-style text shows up in usernames and bios aiming for a heavy metal, medieval, or 'old world' aesthetic rather than for historical accuracy.
Visually similar — most 'Old English' text generators online are producing the same Unicode Fraktur characters this tool does, just under a different marketing name.
Mostly, though older or budget devices with limited font fallback coverage may render a few characters as blank boxes.
Not distinctly — Unicode doesn't define separate Fraktur digits, so numbers stay in their normal form.