Straight from Konami’s website!

The Beginner’s Guide

The main addition is new information on Link Monsters. For a brief summary:

• Link Markers are referred to as Link Arrows
• What we’ve called a Mutual Link is referred to as being “co-linked”.
• The value of a LINK is referred to as a Link Rating.
• What we’ve called Link State (Link Joutai) is referred to as “linked”.
• Link Moto and Link Saki are not clarified.
• Also, it’s called Link Materials. Additionally, they are referring to the materials of a monster as being a Recipe.