Link building is a strategy for building backward links or backlinks, with the aim of increasing domain referrals so that they can play a role in increasing website page rankings on Google search. It is also hoped that the link building strategy can increase Google's trust in the website so that it is hoped that optimization will also be better. There are two link building strategies, namely internal and external. Internal link building builds backlinks from one page to another so it is only on one website. Meanwhile, external link building is placing backing on other websites towards your website.