The main search engine people use is Google, so in order to hit that first page of results, you’ll want to follow their algorithm’s requirements - one of which is known as ‘E-A-T’. This stands for expertise, authoritativeness, and trustworthiness.
Link building is a great way to meet these requirements. By building relationships with high-authority, trustworthy sites, you can boost the authority of your own website. Being linked to by leaders in a particular field will boost your own reputation - and your search rankings.