The regular rules are executed before the image rules. This means you can use these to optimize existing content or create new text fields that you want to use in your ad creatives.
1
Optimize the product title
Make the title more catchy and fitting for your audience, for example by removing unnecessary information.
2
Calculate the sale percentage
Calculate the sale percentage so you can show exactly how much buyers will save.
3
Optimize the price field
Optimize the price field, for example by removing decimals or setting different separators with the reformat number rule.
These are just a few examples, but the most important thing to remember is that the normal rules work before the ad creatives' rules — so you can make any changes to your fields before using them in the image editor!