Remarketing lists for search ads: add-on for e-commerce

dWords now offers remarketing lists for search ads (RLSA). Previously, remarketing was only available for targeting ads to the display network. But now, account managers can use lists to target visitors on Google Search. The way remarketing typically works is you place some tracking scripts on the pages of your site that set cookies. These cookies make it possible to target visitors who have already been to your site before: you can modify bids, targeting, and ad messaging based on the pages a visitor has seen in your site.

Google Analytics multi-channel funnel – four-item Venn diagram is misleading

So, we’re thrilled with Google Analytics’ addition of multi-channel funnel analysis. Google Analytics has a great price – free! – and the addition of advanced features is wonderful for us and our clients.

Why? Multi-channel funnel analysis can show how marketing campaigns interact with each other to influence behavior and the all-important leads and sales that power our clients’ businesses.

AdWords ad testing: Simpson’s paradox and aggregating stats

Typically with A/B ad testing it is necessary to aggregate statistics across ad groups in order to come up with statistically significant conclusions. Unfortunately, when doing this, if your ads are not being displayed evenly, you can run into Simpson’s Paradox.
According to Wikipedia, Simpson’s Paradox is “a paradox in which a trend that appears in different groups of data disappears when these groups are combined, and the reverse trend appears for the aggregate data.” Simply put, when you combine data for ad groups, you may draw the opposite conclusion than you should, picking poorer performing ads over better performing ads.