When putting beads onto something using thread, you have the choice to sew them on or to knot each bead. To knot each bead provides additional security.
Embellish Your Knits: French Knots
Introduction to Knitting With Beads
What's Your Neatest Knitting Hack? – Modern Daily Knitting
to knot each bead when sewing beads - Jill Wolcott Knits
Belon Shawl & Narrow Belon Shawl - Jill Wolcott Knits
Knit with Henni
Beadweaving Basics: Half-Hitch Knot
Belon Shawl & Narrow Belon Shawl - Jill Wolcott Knits
Knit with Henni