Originally Posted by: darickmendes

good day , so I was watching a course and I saw x on some lines and I am really confuse about what they mean and how its done ?

What specific lesson are you referring to?

An X on tablature string lines means a ghost note: a rhythmic click with no pitch. This is accomplished by muting the string with your fretting hand & strumming or picking as usual. You mute by making enough contact with your finger(s) to stop the string from ringing open, but not so much that you create a pitch at that fret.

Anders demonstrates an example in this lesson.

https://www.guitartricks.com/lesson.php?input=29257

Hope that helps!