Tabs, or tablature is a great way to get some insight to how something on guitar or Bass is being played, but should not be depended on entirely. Instead, try to learn it by ear too, and use the TAB as a guideline. Much of the TAB found online can be submitted by anyone, and is often inaccurate. The easiest way to find tab is just google it, typing in the name of the song, and the word "tab." I find alot of good tab at Ultimate guitar.