A progression is simply a series of chords. In the tab you're talking about, progression A is a simpler way of referring to the chords laid out in the tab underneath that heading. Play progression A twice, then play progression B once, then play progression A again.
__________________ <center><font size="1"> For a fun time, go here.</font>
<table width="100%"><tr><td width="60%"><font size="1"> It ain't easy being a
self-perpetuating elite.
</font></td><td width="40%" align="right"><font size="1"><br>Now, little children, abide in Him, so that when He appears, we may have confidence and not shrink away from Him in shame at His coming. - 1 John 2:28 <br />
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