Traits in the LOTRO

To tell the truth, I know little of the trait in the LOTRO. By searching in google.com, I get the information as following:
Each character has the ability to equip traits earned during the game. Traits (in The Lord of the Rings Online) give characters a myriad of different bonuses or abilities. Any trait combination can be equipped as long as they have enough trait slots. The number of free trait slots depends on their level. The first virtue trait slot is available at level 7, for example. Virtue, class and racial traits offer a maximum of five slots, and legendary traits offer two slots. Traits can be easily changed by visiting a bard found in most towns, and equipping traits costs a certain amount of money.
Types of traits include:
Virtue
Virtue traits are common amongst all races and classes and can be earned by completing general goals, such as killing a set number of monsters, or completing enough quests in an area. These traits generally improve stats, resistances and total morale and power, including regeneration. There are a large variety of goals, and each has multiple levels that can be earned during the course of the game.
Class
Class traits are specific to a certain class. These are generally earned by using a class skill or power often enough, or meeting certain conditions with these skills often enough, such as achieving enough critical strikes with a certain skill. These skills improve the power of certain abilities and often give an additional passive bonus to character statistics.
Racial
Racial traits are specific to each of the races. These traits confer special abilities or improvements, and only a relatively limited number can be used at one time.
Legendary
Legendary traits confer rare bonuses. They are obtained by collecting class-specific books and their pages which drop from specific enemies, or from a series of level 45 class-specific quests.
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