Usually when you buy a used boat, the anchor that comes with the boat generally matches the area the boat cruises in. Cruisers that go up and down the coast may have 3 types of anchors so they can choose the right anchor.
Anchor rodes vary also, but there are 2 basic types which are Chain and Line. A chain only rode let’s you anchor with less scope (amount out for the water depth) and also the chain stays parallel with the bottom which keeps your anchor tucked into the bottom. The other rode, line, is usually used with a length of chain at the beginning of the anchor and then your anchor line from that point. There are 2 reasons for this… one is that if there are any abrasive areas, rocks, shells, (anything sharp) the chain at the beginning can handle that, and will not part or cut like line. The second reason that chain is used at the beginning is also to keep the chain and line parallel with the bottom. (Line likes to float a little).