I follow Neil Patel blog posts regularly and i learned a lot from his blog articles and finally i decided to test one of his tool.
Here are Hello Bar Tool Features
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Collect Email: Use your Hello Bar to collect visitors email address
If you use an email service like MailChimp, select it from the list on the left and we’ll sync your contacts there.
If not, no worries. We’ll store your contacts in Hello Bar for now and you can change this setting later if you want.
Where do you want your contacts stored?