Navigate to a page, post, WooCommerce product.
After you have enabled Plugin A/B, you will now see its presence on your product and page post pages.
Now, select 'activate' and Plugin A/B will enable you to upload two featured images to accompany your post and automatically test and optimize your impressions to drive more clicks.
![broken image](http://user-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,f_auto,h_2000,q_90,w_1200/100130/mlfBQ9YfVN_m8by0g.gif)
What are units?
Units allow you to adjust the 'tolerance' of the algorithm when deciding how aggressively to optimize. Generally speaking, setting unit numbers >10 will mean that the algorithm will optimize more aggressively and will default to a winner faster.
We suggest inserting 11, but you may also wish to do more even testing, where you will want to go 15 and up.