FIRST, Sorry for my english . My questions what the best choose for ysm use mass keywords 20000-50000 keywords or use 10 -25 keywords per campaign ? if choose mass keywords how to set bid for all if use mass keywords i'll bid low 0.35-0.50 That right way ? Thanks for all
Try to limit the amount of keywords you put into each campaign, a lot easier to manage and track. You can modify multiple bids with the checkmark feature along left margin
You'll get much better targeting if you have smaller adgroups. Yahoo is not known for it's incredibly laser-targeted ads anyway!