Seed stitch
Changing every knit stitch to a purl on the next row creates small alternating bumps.
Counted practice swatch
For this version cast on 21 stitches, an odd number.
Work the repeat
Every flat row: [k1, p1] 10 times, k1. The odd count flips the alignment after turning. In the round on an even count: alternate k1 p1 and p1 k1 rounds.
Read the fabric
Seed stitch is also called moss stitch in some regions. This page means the one-row change; the double moss repeat has two matching rows.