In the past, SEO experts used direct submissions and SEO tools to get links. These outdated tools and tactics are no longer useful. In fact, a few of the old techniques can actually attract penalization from Google. Today, most webmasters are well versed with the advanced SEO tactics to find link building opportunities but analyzing these activities through Google Search is a whole new ball game. To remain on top of this game, you need to be well versed with the search operators. Here are detailed guide on advanced search operators for SEO link building-
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https://seooptimizers.com/advanced-search-operators-for-seo-link-building-infographic