Before learning this technique, I would just pull the end tightly and weave it in. That leaves a little bump in edge of the crochet. This technique show you how to "fake" a crochet stitch to connect the last stitch to the first stitch of the row, which looks awesome.
How To Crochet the Blanket Stitch ~ This easy stitch is perfect for an afghan or blanket. It is just sets of (3) stitches: one single crochet and two doubles. Once you get into the hang of it, you can do it in your sleep! Use it for a baby blanket in a pretty pink or blue or for a regular afghan with bright colors! You can change colors after a few rows for a multicolored effect.
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