At the heart of many conversations about hair extensions are clip-ins, which are lauded for their ease of application and versatility. But within the clip-in category itself, there are subcategories and variations, the most notable of which are seamless clip-ins and regular clip-ins.

Seamless clip ins vs regular clip ins
Regular clip-ins have been a staple in the hair extension industry for years, and for good reason. These extensions use wefts of hair that are sewn onto a durable fabric base. This fabric base often has small clips attached to them, allowing you to easily clip the extensions into your natural hair to add length and volume.
It’s best suited for those with medium and thick hair types and short blunt cuts.
Seamless clip ins:Each weft has a silicone band at the base.This allows for the extensions to lay flat against the root.
You can list this ideal for those who have thin to medium hair types, if you want themore natural seamless look,or if you want to add highlights or balayage to your look without the commitment of dyeing your hair.
Seamless clip ins vs regular clip ins
Regular clip in extensions looks bumpy when applied on the scalp whereas the Seamless clip in extensions lay flat when applied on scalp.
I prefer the seamless because you can put them higher up on your head and they’ll be less bulky on your scalp.
For those new to clip-in extensions, I offer some handy advice:
Practice Makes Perfect: Don’t get discouraged if your first attempt isn’t perfect. Practice a few times to get comfortable with the process.
Use a Tail Comb: A tail comb can help create precise sections and ensure the extensions are evenly distributed.
Tease for Extra Hold: Lightly teasing the roots where you plan to clip in the extensions can provide extra grip and prevent slipping.
Placement-you want to make sure you are clipping your hair onto a generous amount of hair strands or a net (if your hair is all braided).you want to avoid curving your wefts as the combs on the wefts can strain your hair follicles.
Blending is Key: Ensure your natural hair and the extensions blend seamlessly by gently combing them together.
Overall hair health- if your hair is already mechanically or chemically damaged,try another extensions method like wigs.

Conclusion
As you can see, seamless clip-ins are designed with the modern user in mind, aiming to provide a more refined and natural-looking alternative to standard clip-ins.
Helpful link: Clip ins vs sew ins