Deleting a post on your site should always be your last resort and 301 redirects are used as a way to remediate the damage that the deleted post would make.

Now, what would be appropriate in your case will depend on the type of website and post. If the post is ranked on google and has backlinks, it would be more beneficial to you to keep both the post and the page and to add a link to the page from the post, while keeping differences between both posts content and meta so that they are not marked as duplicate.

Otherwise, if your posts aren't put on a separate directory p.e. "/blog/post-name" and the title is SEO-optimized, you can just add the extra content and convert it to the page while keeping the previous backlinks and content.

If the old post doesn't have any backlinks, does not rank and has a URL that will be different from the page that you are looking to create, then the best solution would be to create a 301 redirect. After creating the redirect, the post will not be accessible by users or crawlers so you can go ahead and delete the old post.

Daniel Rika - Dalerio Consulting
https://dalerioconsulting.com/
info@dalerioconsulting.com

The Moz spam score is measured on a multitude of metrics, some of which are related to backlinks and some not. The fact that you have purchased an old domain that dates back to 2013 on web archive ( which although in itself is not negative), is possibly a factor that has contributed to tip over some flags.

You can find the full list of metrics that Moz uses to calculate the spam score here:
https://moz.com/help/link-explorer/link-building/spam-score

You will need to analyze the factors listed there in order to work on improving your Moz Spam Score.

On the other hand, the Moz spam score is a metric created by Moz and it doesn't necessarily represent how your site will rank on search engines. I suggest that you keep adding quality unique content and good backlink on your site, and I'm certain that as the time passes your site spam score will decrease.

Daniel Rika - Dalerio Consulting
https://dalerioconsulting.com/
info@dalerioconsulting.com

Crawled - Currently not indexed is the most common way for pages or posts on your site not to be indexed. It is also the most difficult one to pinpoint because it happens for a multitude of reasons.

Google needs computing power to analyze each website. How it works is that Google assigns a certain crawl budget to each site, and that crawl budget determines how many pages of your site will be indexed. Google will always index your top pages, therefore, the excluded pages are of less quality rank-wise.

Every website has pages that are not indexed, and the healthy ratio of non-indexed pages will depend on the niche of the website.

There are however 2 ways for you to get your pages out of the "Crawled - Currently not indexed" pit:

• Decrease the number of pages/posts. It's a matter of quality v quantity, so make sure that put more attention into linking every new post so that they get indexed in no time. Don't forget to utilize robots.txt to block pages that aren't useful to the site from indexing so that the crawl budget can be assigned to the other posts.
• Increase the crawl budget. You can do that by raising the quality of the pages/posts. Make more internal and external backlinks for your posts and homepage, make sure that the articles are unique and keyword-optimized, and work hard to aim so that each article will rank on that first page.

SEO is a tough business, but if managed carefully, over time it will pay off.

Daniel Rika - Dalerio Consulting
https://dalerioconsulting.com
info@dalerioconsulting.com