This may be a question for the new riders forum, but...here goes...

I just bought a pair of Pearl Izumi Attack road shoes that have the three triangular-shaped holes on the sole. What is that called???

The pedals I'm looking at are the Shimano 105 SPD-SL or Speedplay light action. I'm pretty sure that the Shimano's fit the shoe, but how do I know about the Speedplays? The pedals look completely different...

Any recommendations for pedals for someone new to clipless??