A Motion Path allows you to control not only where an object appears on your slide, but the path it takes across the slide before it exits.
To create a Motion Path, first apply an effect to an object: Right-click and select Apply Effect to open the Effects panel (which will appear at the bottom of your window, grouped with the Timeline by default).
In the lower left of the Effects panel, click the Add Effect button (the FX icon).
Select an Entrance effect (I selected Entrance > Fly In > Fly In From Right).
To apply the ZigZag Motion Path effect, right-click the same object, click the Add Effect button again and choose Motion Path > ZigZag.
On the Effects panel, drag the ZigZag effect right until its left edge lines up at the 7s mark (you'll find that working with the Effects panel is similar to working with the Timeline).
And now for the zigging and zagging: Select the object and notice the number 1 that appears in the lower right of the selected object.
Click the number 1 to reveal the object's current ZigZag motion path.
Drag the green arrow at the end of the motion path to the right and just off the slide.
Drag the white dots at the top and bottom of the path to change the height of each zig and zag.
Preview the new few slides to see your new motion path.