CPM stands for "Cost per Mille" (also known as "Cost per Thousand"), which is a metric used in advertising to measure the cost of reaching one thousand impressions or views of an advertisement.

A 301 redirect is a permanent redirect that automatically sends users and search engines from one URL to another.

The shopping cart abandonment rate is a metric that reviews the percentage of online shoppers who add an item to a cart or bag without buying those items.