Cosmetologists... HELP

Okay so I have a question.. I got my hair colored the other day and love it! My stylist was talking how I should do I glosser on it, she gave me a bottle so I could try it and I have no idea what I'm supposed to do. She's not answering her phone, do I mix this with my developer? Put it on straight? It's Redken. I've researched and cannot find any instructions