What is the best H1 product card?

Question

Search Engine Optimization

Let's say a store sells Apple equipment and they have a product card, which H1 you would choose at your discretion. I note that different top cantors call their card differently and an opinion arises, why? Which H1 would you choose:

1 Apple iPhone 8 256gb Red (Red)
2 Apple iPhone 8 256gb Red
3 iPhone 8 256gb Red
4 iPhone 8 256gb Red
5 Mobile phone iPhone 8 256gb Red (red)
6 Smartphone iPhone 8 256gb Red
7. iPhone 8 256 Red

Answer 1

The main thing: decide on the main search query , under which the page is created / optimized.
Compose H1, taking into account the rules as much as possible (for Yandex):
1. H1 must contain the words from the query in the exact form
2. H1 must not contain repetitions of the words from the query
3. H1 must contain all the words from the query
4. The words from the query must be included in H1 in the same order
5. H1 should not contain only the words from the query (H1 should not match the query letter-to-letter)
Desirable:
6. H1 should consist of one sentence
7. Direct exact full occurrence (DEF) of the query in H1 is welcome

Answer 2

"Mobile phone smartphone Apple iPhone 8 (Apple iPhone) 256 GB Red (red)"

Answer 3

enter in the search popular keywords for your subject, and select the h1 options for sites that are in the top3.
It is obvious that all presented h1 are optimized for different requests.
Someone feels the strength in himself and takes the highest frequencies, while someone takes the midrange and low-frequency requests in order to snatch at least something. It is often better to be in the top with the low key than in the high frequency on the second page.
Naturally, if the store is weak, it will be difficult to get to the top in HF. and in LF and MF it is still possible to oust competitors.