When reading chord flows online for guitar music, what is the strumming pattern

Question:For example, for Poison's song "Every rose has its thorn",

Its something like this:

Gadd7 D
Every rose has it's thorn....just like every cowboy sings a sad sad song

I know this isn't the correct words and that its probably not the right chords. My question is how do you strum this? Do you just play the G strumming from top to bottom or do you go up and down up and down? I am very new to guitar and just wanted to know how to strum while playing chords of songs.

Also, what exactly is a Gadd7 chord? Is this just a variation of a G major, a barre chord maybe?

Best Answer - Chosen by Asker: For example, for Poison's song "Every rose has its thorn",

Its something like this:

Gadd7 D
Every rose has it's thorn....just like every cowboy sings a sad sad song

I know this isn't the correct words and that its probably not the right chords. My question is how do you strum this? Do you just play the G strumming from top to bottom or do you go up and down up and down? I am very new to guitar and just wanted to know how to strum while playing chords of songs.

Also, what exactly is a Gadd7 chord? Is this just a variation of a G major, a barre chord maybe?

well the way I see it is making chords is more of left brain activity . this finger goes on this string in this fret , that finger goes on that string on that fret etc. strumming is more right brain . you kinda just have to get a feel for it. strumming has always seemed harder to me for that reason. listen to the song. try different ways of strumming it. as for the Gadd7 . I would go to
www.chordfind.com

There are an infinite number of rhythm strumming patterns that you could come up with -- the trick is to come up with one that creates the right rhythm "groove" for the song you're learning. What you might do is listen to the recording -- listen to the drummer, the bass and the rhythm guitar -- and play along with it and see if you can invent a strumming pattern that works.

To be honest, I'm not sure what the difference is between a Gadd7 chord and either G7 or a Gmaj7. At the least, you could play a plain ol' G major chord and leave out the added 7th.