Welcome to Chordie Parttimer (and son)! The images that show up on the right side of the screen when viewing songs are chord charts. This page http://www.chordie.com/chords.php on chordie is a great huge chord chart resource.
This chord is a D:
The chart/image represents the fretboard. The top horizontal line represents the nut (tippy top of the guitar), each line under that represents a fret. The vertical lines represent the strings. The line on the far right represents the high E string (thinnest string, the one on the bottom when holding the guitar). The dots show where you fret the strings. The X on top indicate to you not to play those strings, and the O on top indicates to leave that string open and play it (not to fret it). So in this example you do not play the two low strings (strings on top of the guitar when you're holding it - the Low E and A strings). You leave the D string open and do play it. The G string is fretted on the 2nd fret, the B on the 3rd, and the high E on the second.
On this site http://justinguitar.com/en/BC-108-TABandBoxes.php you can view a better and probably easier to understand explanation! It also will show you the basics on how to read tab.
Never feel silly for asking a question here. Everyone is really quite helpful and friendly... and we all started somewhere!
Art and beauty are in the eyes of the beholder.
What constitutes excellent music is in the ears of the listener.