Bubble pattern

#1

I don’t understand this can anyone help please?

Special Abbreviation
K5B (Knit 5th st Below) - slip next st off left-hand needle and drop 4 rows down. Insert point of right- hand needle under strads and into the st on the 5th row down, insert left-hand needle under the strands and into the stitch. Knit the st normally catching the strands at the same time.

#2

Welcome to KH!
This seems like the clearest video for the bubble stitch. The numbers may be different from those in your pattern but the idea is the same.

#3

Thank you so much. All makes sense now. Have a lovely day.

#4

Thank you so much, all makes sense now. Have a lovely day.