أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
I am afraid you need to ask the NEW GENERATION for this... :-))
I am just another oldie hahahahahahaha
it depend Which marketing :
For email marketing I suggest you Mailchimp
For keyword research I suggest you adword keyword planner
To target your free audiance of facebook you can use facebook audiance insight
to now they purchase behaviours
If you want to work with free traffic by trending event you can use google trends
the is some from a lot of free you can use to grow you business in the beginning
