Work even in St st. ?

I am knitting a Lace Hem Top and it says to "work even in St st. Does that mean I knit one row then purl the next and so on?
Thank you

Yes. Work in st st is short for work in stockinette stitch. Flat is knit one row and purl the next. In the round is knit every row. When it says to work even, it means that there are no decreases or increases.