A blog is not a blog without content so once you’ve set your blog up you need to focus your attention upon creating useful content. What you choose to create will depend a little on the topic that you choose to write about (on that note, most successful bloggers have some focus to their blogging whether that be a niche or a demographic that they write for).
And so, I guess my question here would simply be–would a person who follows your blog about TV shows be interested in paying for a TV-related webinar you created? Would a person who follows your blog about vinyl record collecting want to buy an online course from you? Would a person who follows a travel blog you created want to call you up for coaching lessons?
Once you setup your account on AdSense you will be given a code to add to your blog. This code will automatically display advertisements on your blog from companies who are part of Google’s advertising network. You may see ads from small companies related to your topic, or you may see ads from large companies that are completely unrelated to your topic.