Segmenting Your Active Subscribers
Even within your active list, you can do more. Divide your europe cell phone number list active subscribers into smaller groups. This is called segmentation. You can segment based on what they buy. Or what emails they open. Or what pages they visit on your website.
For example, you could have a segment for "Customers who bought X product." Or "People who often open emails about sales." Sending very specific emails to these small groups works wonders. It makes your emails even more useful. This boosts engagement even higher.

Common Mistakes to Avoid
When cleaning your Klaviyo list, try not to make these mistakes. Avoiding them will help you keep your list healthy. It will also help your email marketing efforts.
One big mistake is never cleaning your list. Many businesses just keep adding new people. They never remove the old ones. This is like adding new clothes to a closet without ever throwing anything out. Soon, the closet is full of things you don't use. Your email list becomes less useful too.
Another mistake is being too scared to remove people. You might think "a bigger list is better." But this is wrong for email marketing. A smaller list of active, interested people is always better. It saves you money and gets better results.