Knitting is way of forming loops of yarn so that they form a coherent whole. There are several distinctions: flatbed knitting, V- bed knitting, fake fur knitting and circular knitting.

Then there is warp knit where every loop has a separate yarn-feed

And last but not least we have knitting by hand with 2 or more needles.

Hand knitting KNIT/PURL
There are knit and purl stitches. The knit stitch pulls the yarn through the front of the loop whereas the purl stitch is pulled through the back of the loop.