Submitting blog to directories, does they help SEO?
Worthy directories like dmoz can give you some boost but that just a little. Mainly directories are good for outreach.
Yes it is the good tactics to submit blogs to the directories which help you to get
Quality backlinks
Good Page rank
And help you to get Domain authority and traffic as well.
Directory submissions are no more important as Google considers them as 'thin' sites with very less content. They are rarely crawled and indexed in Google.
Submit your blog into blog directories then it is beneficial.