What does it mean when a round is shown as Yes or No in the Included column?

All rated rounds you have played and have been reported to the PDGA within 12 months of your most recently rated round will be Included in your rating calculation. However, if any one of those ratings is either more than 100 points below your average rating or more than 2.5 standard deviations below your rating – whichever number is smaller – that round will not be included in your current rating update and indicated with a No. This include/exclude calculation is done for each update so it's possible your lowest rated round might be excluded in one update and included again in the next update. The more consistent you play the more likely no rounds will be excluded. Inconsistent play means you'll more likely have one or more low rated rounds excluded. Rounds where you DNF (Do Not Finish) are never counted in your rating.