Yes, the best article you can read at internet is:

https://support.google.com/analytics/answer/1136920

It will help you a lot!=)

You can too disallow the link with this google link: https://www.google.com/webmasters/tools/disavow-links-main

So it will not hurt you

Hello!

Here is a link about the topic: http://www.wpbeginner.com/beginners-guide/categories-vs-tags-seo-best-practices-which-one-is-better/

You can check it and edit your website with the advices

Surely before you used blogger or something like that.

Once upon a time something similar happened to me!

As always will depend on how you do it!

If you do it in a healthy way, you will not be penalized and you will be great for the blog.

On the contrary, as discussed above, it is possible that they consider it as SPAM if you do it improperly and it is much worse

Hello!

Here is a link about the topic: http://www.wpbeginner.com/beginners-guide/categories-vs-tags-seo-best-practices-which-one-is-better/

You can check it and edit your website with the advices

Yes, the best article you can read at internet is:

https://support.google.com/analytics/answer/1136920

It will help you a lot!=)