Those aren't tabs - they're chord diagrams (shown using tab).
The first chord is B minor 7th and as the first column shows, you can play it as shown by holding those frets. All the other columns are showing the other chords mentioned.
BUT - this isn't standard tuning, so if you've only just begun learning, you should learn standard tuning (EADGBE) before you look at alternate tunings, like that one they are using (DADGBD).
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