What are doorway pages:

[ladieshostel]

Doorway pages are web pages that are created for spamdexing. This is for spamming the index of a search engine by inserting results for particular phrases with the purpose of sending visitors to a different page.

 

[seotime]

Doorway page jump page, gateway page, mirror page refers to a webpage that is inserted in front of the actual page with the purpose to direct users to a specific landing page and doorway pages always a bad idea.

 

[agnipestcontrol]

Doorway pages (bridge pages, portal pages, jump pages, gateway pages or entry pages) are web pages that are created for the deliberate manipulation of search engine indexes (spamdexing). ... Doorway pages that redirect visitors without their knowledge use some form of cloaking. This usually falls under Black Hat SEO.

 

[shivaw]

Doorway pages are defined as low-quality pages (or groups of pages, or entire websites) optimized to rank well for specific keywords that act as a door between users and content. Characteristically, they offer little value to visitors and serve the sole purpose of boosting SEO value.

 

[sadianisar]

Doorway pages are Black Hat SEO techniques in which user is redirected to the similar webpages when inserted a particular phrase.

 

[auraiyaitsolutions]

Doorway pages created for fake traffic.