Rode simply refers to the line and/or chain that connects the anchor to your boat. (Believe it or not,rodeis not a typo!)
Ideally, the rode for any anchor setup should consist of both chain and rope. The chain should be on the end with the anchor. Why use both chain and rope? First, it keeps the nylon rode from wearing away by rubbing on the bottom of the sea-floor as the boat swings. Second, because the chain is heavy, it holds the rode to the bottom so the pull on the anchor is horizontal, which reduces the chances of your anchor unsetting.
What type of rope should I use? Nylon, Polyester, or ...?
For most boaters, the best type of rope to use when anchoring is nylon. Nylon has many advantages for anchoring including:
It's elastic therefore offering good shock absorption
Light and flexible
The most common anchor rope found in marine stores
Nylon anchor rope is light, flexible, strong, and provides elasticity, which mitigates peak loads on your anchor and boat. Unfortunately, the very fact that nylon stretches means that it creates heat and will eventually break down and need to be replaced. However, you want a strong rope that will absorb the shock from waves and sink, not float. Nylon fits the bill of all of these things.
Quoting From https://www.anchoring.com/blogs/anchoring/how-to-pick-an-anchor-rope-size-type-length-and-more