Type URL of your website to get quantity of backlinks from homepage - homepage to your website. It will show you total outbound links, inbound links on that page and follow domain for each of your inbound links, outbound links available.
api.slack.com
Out-link is a link that points from your website to another website. These are out-links list of api.slack.com ( 1 ) View all
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In-Links : Another name for backlinks, or links into a domain from external sources.These are in-links list of api.slack.com ( 10 ) View all