Title : Directories prefer 2-4 words Title
Descriptions : ideal description is 150-250 characters
Name: Can be fictive
Email: (not important email because of eventual spam from directories)
keywords: From 3 to 8 keywords
Related categories : 3 suggestions is ideal.
Can you briefly explain how the injection into the PR1 750 directories work? I'm confused. Thanks!
We submit your website domain to directories in a proper category. We will submit the url and a brief description of your website, that you will provide.
This helps a website in a few ways:
1- Chance to bring direct traffic from directories
2- Optimisation of your ranking in Search engines, because you have built links with proper keywords
I would say the effort is more recognize for number 2.
As for PR1, it is simply a measure of establishement for a website. Being PR1, means the directories as more chance of being old and indexed then a PR0 directories. This doesnt mean that the PR0 might not become more powerfull then another PR1 in the long run.
Hope this help. Do not hesitate if you have further questions.