A toner adjusts color direction after lightening. It can soften warmth, make blonde creamier, or shift brunette into a cooler or richer family.
A gloss focuses on shine and tone. Many glosses add a sheer veil of color while making the hair feel polished.
A glaze is often used as a soft shine service. Product lines use the words differently, so the best choice depends on your current hair and your goal.