Does this considered good earnings (Google AdSense)?

adsense income is hard to determine. you can take two websites with the same traffic and impressions and one will make .89 cents and the other will make 45 dollars. the difference is the keywords and ad placements. you have to make sure your page descriptions and keywords are accurate and in the page. ad placement depends on the design of your site. standard design calls for the main ad to be within the top 300 pixels of the page or a large skyscraper on either side. you also want additional ads spaced out. you don't want ads too close together. blogs don't have as many pages unless you have thousands of posts and people want to look at all of them.