Rotations and matching are two separate events.
Rotations are what you do in a hospital during years 3 & 4. Things to look for: Does the school have long, healthy relationships with local hospitals? Are you expected to arrange your own rotations? Will you be expected to move to another city and/or state for years 3 & 4? Will you be expected to move during those years as well, as rotation sites change? Do you have to come back to the school for exams, if so? Are you given lots of time 4th year to do elective (audition) rotations outside the school's system? Is there a long, remote rotation during 4th year that could conflict with residency interviews? Is the 4th year content relevant to your interests, or is there an emphasis on a theme that's not your cup of tea? Are the odds low that you'll be in a large, tertiary care hospital where you'll see TONS of varied pathology? Are you given support during 3rd & 4th year for board study? Generally, you want to know if a school has a history of trouble, or requirements that will get in the way of your goals.
The Match is how 4th year students and residencies are put together. Late in 3rd year and early in 4th year, you're expected to figure out what you want to do, and in many cases, do audition rotations with residency programs that interest you. You then interview with different residencies, maybe November through January. Then you rank programs, and the programs rank you, and a computer does the math. And your future, to which you're contractually obligated, lands in your hands in an envelope at a big ceremony. Match lists are easy to find on SDN. What to look for: if you're interested in school X, does school X match ANYBODY into the specialties you think you might pursue? Was this last year an anomaly in those specialties? Are grads of school X matching into residencies in parts of the country where you want to work? Are school X grads getting into competitive ACGME (allo) residencies, generally, and do you care about that? You can't make assumptions about what's going to happen to YOU based on a match list, but if for example you want to do surgery and the school matches very few surgical specialties, that's good information.
(Note that there's a large rathole you can go down, which is the question of whether you "should" do an "MD" (ACGME) or "DO" (AOA) residency. This question has no universally applicable answer, and the school you choose has much less to do with the answer than your performance there. Whatever you dream of doing now, your performance during the first couple years of med school will determine whether you can realistically pursue that dream. It's perfectly appropriate to postpone choosing between ACGME vs. AOA, in my view, until 3rd year.)
Best of luck to you.