Adsense is a Tool by Google which gives to Income by Placing their Ads on Your Website. The amount of Income depends on Your site Traffic and CPC. Placing Ads by using Adsense is very Easy but You need to be Qualified to get Ads on Your Site. You can earn from the First day of Your Blog if You live in Countries like U.S, England etc. but there are Exception. If you are From countries like India, Bangladesh, etc. Your Blog Should be 6 Months old in order to Qualify for Adsense but not only having 6 months older Blog you will be able to Qualify for Adsense, Your blog should be active for that period of time then only you will be able to earn Income from your Blog through Adsense.
Follow the Steps Below to Put ads on your Blog in Blogger:
Step I: Go to Google Blogger and Select the Select the Blog in which you want to put ads.
Step 2: Now Go to Layout section of your blog.
Step 3: In Layout section Click on the add gadget
Widget where you want to place your Ad whether its your sidebar or between your blog posts or anywhere else, you can add almost three Ads per post.
Step 4: When you will click on "Add Gadget" a new pop up window will appear you will see basics menu there where you can select "Adsense" by clicking on the "+" button on the right side of that Gadget.
Step 5: Select the type of ad you want to put in your Blog select whether it text ad, picture ad, or both text and picture. Select color, font and all the other thing for Your add, or you can leave this and just click on save.
Step 6: Now You are Done!, Ads will be start appearing in Your blog right where you have added your Gadget.