# Full-Stack Ecommerce

#### Why Return on Ad Spend Bidding Kills Ecommerce Profit

"Here's the math: $5 in sales ÷$1 in ad spend x 100% = 500% target ROAS" (Source: https://support.google.com/adwords/answer/6268637)

Before I explain why ROAS kills profit, you need to understand exactly what ROAS means in Google AdWords. I have a complaint...

#### Magento 2 API Response Field Filtering

I recently got started with some work integrating some older systems with Magento 2 using their new REST API. Right at the top of the Getting Started with Magento 2 APIs Introduction there's a list of features, including this one:

• The framework supports field filtering of web api responses to conserve mobile bandwidth.

That sounds nice. Let's get some of those responses down to just the fields we need, and speed up the data transfer just a bit!

#### Should You Target A Certain CPA in AdWords?

In a word, “No!”

In two words, “Hell no!"

In eight words, “No, because of the law of diminishing returns."

Here’s why…