UltraViolet, a group which advocates for women’s issues, said it has taken out online ads in three states and started an online petition pressing Target to increase its wages. The move comes on the heels of Wal-Mart’s announcement last month that it was lifting its minimum wage to $9 an hour in April and to $10 for current employees in 2016, above the federal minimum of $7.25. Gap Inc (GPS.N) had lifted its pay last year.