Which is the most interactive A/B testing tool?

As we have an app. It requires email id's in exchange for a download.

We are looking for good auto-responder which can send emails when one submits or downloads the app. Our current budget is $50 per month. But we can increase it if the service is willing to make customizations for us.

I have a product site. Now for the description of the products I need upload a blog for it. So, what is good should I buy a new domain for it, or just add a sub-domain in the present site?

I am seeing the site domain (which is most suitable) available.

I have built two high quality backlinks through guest posting. Since then two weeks have passed but I am not seeing the backlinks visible in any of tools or google's webmasters tool. Why is that?

There's been a lot of chatter lately regarding this that good and improved content is ranking better in the Google SERP's after the Marech Algorithm update.

What do you guys think about it?

Which is the best network to promote CBD product? Or, the best way if you may suggest.

How many sites do you need in a PBN to actually make a difference?

Many sites were hit in a good way. And many sites were hit in a bad way.

Some recovered their rankings and some fell terribly. From what I am noticing sites with improved content has made improvements. Its not in any specific niche or industry but in all of them.

What do you guys are seeing?

What percentage of SEO budget do you spend on kw research? Just a food for thought.

Hello friends,

Why We Use Robot.txt File In Seo..?