Budgets

Some days I blow right through the budget by 10am, so I lower the bids. Then there are some days where I'm barely getting clicks or impressions.

What gives?

Just like the SERPs... depends who is above you.

The next step is to figure out which days this happens on, and to time your campaign to take advantage of those quick days (with lower bids), and to shut down during those high-bid days.

Hmmm...for instance. This is what happened this week.

Mon: 18 clicks, 2,472 impressions -met budget
Tue: 17 clicks, 1,398 impressions -met budget
Wed: 19 clicks, 4,850 impressions -met budget
Thu: 12 clicks, 706 impressions -$8.00
Fri: 2 clicks, 211 impressions -$2.00

You can control settings within Adsense for how your budget is spent - either spread out over day... spend as fast as possible... or detailed scheduling.

Most basic factor is supply and demand and your keyword bid. Often sites experience surges for particular key words - for example on holidays like Valentines Day, etc.

I have it set by day, but there are certain days where the budget is gone early in the day, and other days where I have very low click volume, and low impressions.

The best way for you to maximize your results is to find your trend. I would follow something similar to what powerspirit said. You have some hard facts in your stats. Learn the strong and weak points in your campaign and pump up your budget on the days you see your daily budget lasts longer with a less CPC.

Developing and recognizing trends is a huge part of PPC and any marketing campaign. Some days are more popular in your industry then others. We get streaky in our field as well but learning when you can take advantage of your PPC and when to cut back will help your money and conversions go a longer way.

Unfortunately, we cannot seem to figure out why one day we get a large volume of sales while the next day we get only a few. Our only guess (organically speaking) is the fluctuations in googles results due to them tweaking their algo's.