What does continue in pattern as established mean in crochet?

This will be a hypothetical crochet pattern here;

Row 1: double crochet 3, single crochet three, double crochet 3.

Repeat in pattern as established.

Repeating in pattern as established basically means double crochet the double crochets and single crochet the single crochets.

It means repeat whatever you did to make the stitch pattern over and over again to keep the pattern going.

The hypothetical pattern I used below may have been for a wave but not sure. These "established patterns" can be one row or fifty rows. it just means work through each row and then once the one pattern repeat is finished (meaning you've worked all those fifty rows) then you start at row 1 again and work your way up.

Hope that helps.