Just joined adsense. Went from public service ads to targeted ads in about a day. No clicks at all onthe first day but not a surprise as I am starting form nothing with no traffic at all. They were not quite what I had hoped for so I changed the meta-tags and added some more key words in the pages. I also went into the adsense ad setup and changed some colors on the ads. My question is how long or how often do the ads get changed or how long before I see my changes recognized, any ideas? Thank you for your help.