About daily visitor to my site, how can i track them?
Yep, GA and if you’re feeling brave have a go at Google Tag Manager to add that extra level of detail around Events and Goals.
Regarding tracking. I’ve only used more ‘professional’ tools such as Pardot which can give you visitor info on individuals, once you have their email. Cost might be an issue though.
If you’re using WordPress to build your site and are new to analytics (or don’t need anything overly powerful), JetPack is a good way to go.