Your CTR is pretty low.
There are many ways you can increase earnings for a blog.
One, you can attract higher-valued traffic.
What I mean by this is the geographic source of your traffic should be Tier-1 countries.
I'm talking about places like the United States, Canada, and Western Europe.
That should be your first priority.
Look at your niche.
Figure out the keyword targets that tend to attract more people from those regions.
So depending on what keywords you are already targeting, this may mean changing the direction of your content publishing strategy.
The next thing you should focus on is click-throughs.
It's not enough for people from the right countries to view your content.
They have to actually click on ads.
This is where a lot of people fail because they would be content with whatever ads Google shows.
A lot of the time, those are low-paying ads.
You have to come up with content that you know pulls up high-value ads.
In this context, it seems that the ads actually act as supplemental content to the stuff that you already have on your page.
In other words, when people click on the ads, they are actually getting more value because your content already prepares them for that added value.
This is not always possible because it depends on the niche that you are targeting.
But if you're able to do this, this can explode your income.
I'm talking about not just double but triple or more.
If you're able to use this content strategy, the ads act as supplemental content.
The third thing that you could do is to maximize the amount of pages the typical visitor to your site views.
This is where you need to get creative because you have to have hooks throughout your content that get people reading.
You can't just give them the answer and then they bounce out.
You have to tease them a little bit.
You have to emotionally engage them.
Get them to read all the way to the bottom, and then call them to action to click on a link, go to another page, and repeat that process again.
If you're able to do this for most of your pages, a lot of your visitors will stay longer and this increases the chances that they will find an ad that they would want to click.