Senecio Rowleyannus - to spare your blushes I shall only say its proper name once... From here on in lets call it a String of Pearls. They also referred to a String of Beads and String of Peas. Many of my customers like to call this little plant the 'Pea Plant'.
These little guys are leading the way in the house plant trend! They're the stars of Instagram right now.
In nature these guys are a creeping vine plant. With the pearls dropping to the floor and rooting where they are. Then creeping along the ground, creating a dense carpet of plants. Imagine that. A carpet of pea-like plants. I kind of like that idea!
Allow the soil to dry out between watering. Do not over-water or allow the plants to sit in water.
String of Pearls plant like bright indirect light, they like to be near the window with strong natural light. They don't like direct sunlight, they will get burnt easily.