Is it a good approach to keep on changing the ads placement?

Dont try Image Ads if you dont have a Huge and massive traffic... always use text only ads which pays multiple than image ads.

Also work on keywords and metas and ads will get relevant and hence more clicks and so your adsense income rises

 

dont just keep changing for no reason, keep changing till you get the most converting ads and stick with it.

if you however have lots of repeat visitors, then you might wanna change it from time to time

 

yes, it is very useful to chage the place, it will raise the CTR for your ads

 

What is the concern of Image ads with Less traffic or Images/Text ads with huge traffic ? Does Image ads pay less as compare to Text ads ?

 

all you can do is test and make sure it's 'good enough' to work.

 

Move them around, but you must track the ctr once you have changed them, otherwise it would be a complete waste of time.

 

My CTR is very low, but What ever I've earned, I m satisfied with that, However I still want to increase my CTR