i want to ask since it's been a pretty long time competitors do this, they use alternate meta tag to their amp site and then sometimes they also do alternate in their amp site, and then in serp the one site that would pop up in rank is amp site. Why, and is this manipulating ways benefit much and how long for estimation will it stay useful
| <link rel="alternate" hreflang="id-id" href="ampsite" /> |
| <link rel="alternate" href="ampsite" /> |
| <link rel="alternate" hreflang="id" href="ampsite" /> |
| <link rel="alternate" hreflang="en" href="ampsite" /> |