The glyph.
The Great Glyph of Strength was an ancient Ewok symbol. According to legend, it had magical properties to it, which made Ewoks nearby more resistant and hardy, even more than with the Glyph of Strength.
The glyph depicted two drops of liquid. Ewok glyphs would often be carved on trees where Ewoks lived.
Sources
Ewok Village on StarWars.com (article) (backup link) (First mentioned)
