More than 80 % of online community uses search engines for online enquiries and visiting website. Only top 30 ranked websites in search engines are really relevant. No one has time for going through pages of search engines.
A lot of companies boast for submitting your website in more than 1000 of search engines at a low cost. Please ask them to name 15 of them. 99% will fail to do so. 10 to 12 search engines and directories enjoy 99% of queries. Spamming is a story of historical era. Meta tags are irrelevant.