Today I was going through by blog and suddenly I noticed something is wrong with my Google Adsense Text Links unit. This is the first time I noticed in adsense.
The change I was seeing there was a search box in the place of links. I tried again and I was not able to reproduce the same result. I am not sure if this is already there and I never notice or Google is trying something new 
Adsense is my main source of income when making money online. nothing beats adsense when it comes to making money online.
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