1:Some or all of the world's lots are far away from roads, or not aligned against them. Lots should be placed next to a road in most cases, unless there is a very good reason not to do so. Make sure to use the grid tool so the lots are aligned right up against the roads too, without a gap.

4:You have placed some lots away from roads, but their placement makes sense.

5:Your lots are placed near roads and align nicely against them. Great job!