PLEASE I need help!

I am tackling a shawl for my mother for x-mas. My first experienced rated pattern. In the pattern it says to yo twice. I get that part, but what do I do on the purl side? It just says purl all even rows. Do I purl twice in that hole, or is it just to create a bigger hole?? I can’t ask her because she will want to see the pattern… I’m waiting here holding my shawl and just hoping someone answers!

simply pearl each yo as if it were a regular stitch.

You saved me hours of pulling my hair out!! Thanks a bunch!