Instructions and what do they mean?

Abbreviations:

slip st, sl, sl st : slip stitch

ch :  chain stitch

sc : single stitch

dc : double crochet

hdc: half double crochet

tr : treble crochet

RS : right side

WS : wrong side

inc : increasing

dec : decreasing

rnd(s) : rounds

t ch : turning stitch

yo : yarn over

tog : together

MC : main color

SC : second color

sp :  space

cl : cluster

FP : front post

BP : back post

dtr : double treble crochet

tr tr: triple treble crochet

* *, () : means to repeat in between  symbols

XBP : crossed back post

XFP : crossed front post