Personalization apps are for bringing the user closer to their desired outcome, in an automated way. They increase conversion rate and average order value.

Personalization tools work best as your store scales - the more customers and data you have, the more effective many of these tools become. They also work better when you have a large SKU count, typically because the product recommendation engine becomes very valuable at this point.

Personalization tools should be managed by your marketing team in conjunction with either a head of Ecommerce or merchandiser - because this person may need to feed specific rules to the app for guiding user behavior to let's say, products about to go out of stock, or thelike.

You want a tool that loads quickly, typically they load asynchronously so they don't affect SEO, but the quicker it displays the information, the better, and this is now just par for the course. You want to know how many data points it is tracking on users and the "robustness"of the companies "AI." You want to know where the personalization can take place - on-site, in emails, texts, etc. And you want to be able to track and prove an ROI from the tool - typically by split testing and seeing increase in conversion rate and average order value.