In very simple terms the table ranks the next 6 fixtures in terms of “easiness”.  The team at 1 in the table will have the 6 easiest fixtures and the team at 20 the 6 hardest fixtures.  Its worth noting that the schedule is more for the attacking ease as its difficult to cater for both goal potential and clean sheets in all cases.  Ease is determined by the rank of the defence the team will be facing.  See my article “rating the defences”  (in the fixture ease category)  where I rate in order each teams home and away defence

I’ve then done the table again for GW3 and GW4 so you get a slightly longer perspective

Also when you buy and sell always look at actual fixtures as a common sense test.  A team may be ranked low on the fixture ease schedule because the last 4 of the 6 are hard but the next 2 could be Crystal Palace and Aston Villa so don’t sell at this point.