Page authority ranking criteria are similar to domain authority. It’s ranked on a scale of 1 to 100. Page Authority measures the predictive ranking of a web page. The page authority of a website can change depending on various metrics. Search engines examine the relevance and authority of a page based on its contents and external links. If a webpage has links to higher authority sites and has keywords in it, its authority ranking will increase.
If you buy a domain from a 3rd party, the backlinks are valuable. I always wait a few months before redirecting, so just set up a quick minisite until two page rank updates have passed and then go ahead and 301 redirect. However, it seems that you'll get the link juice from the back links, the anchor text is ignored by Google. Buying a domain at Godaddy TDName expired auctions, seem to not count as a dropped domain if you immediately set up a mini-site.
Backlinks – These are basically anchor links present on external websites that take the visitor back to a domain. The higher the number and authority of backlinks, the higher the authority of a domain. For example, if a domain has a backlink from Forbes, TechCrunch or BBC, it’ll gain a lot of authority in the eyes of Google and other search engines. It’s like attaching a reference letter from Bill Gates to your CV.
So, let's start off with the simple website list crawl. So settings for this is covered by the general crawl settings and these apply to all the other types of crawl as well, such as the Search crawl and the Endless cruel, so pretty simple really. Delay between each request to a website. One second, this is in seconds. Secondly, concurrent websites crawl how many websites you want to crawl at any one point in time and then how many threads will concurrently crawl per website. So that's ten, a crawl of ten websites at once, and each of those websites there's three different threads crawling. That's 30 concurrent connections you've got going.