Welcome to the Q&A Forum

Hello, I have an ecommerce website. Due to discounts and sales on most of my products, the discount rates change very often. Some products have %10 discounts for 3 days and then same products might have %50 discounts for another 5 days. I would like to show these product specific discounts on Meta Titles and Descriptions dynamically. My system will automatically update the Meta Titles once the discount on a product changes. My question is, how often can I change the Meta Titles? Is changing them (only discount rates = 1word) too often bad for my SEO? What is Goolge's approach on this? Thank you in advance for all your help. Best,
Yigit