Google Algorithm updates

Doorway page Algorithm

Doorway pages dangerous for micro niche websites. due to same keywords every same post title(that are partially matched).

if you running a scholarship website of 10more states.
state 1 scholarship scheme, state 2 scholarship, state3 scholarship

those above are doorway pages. Actually doorway page sending users to main page by having child posts like same services in different places, personal services city1, personal services city 2,
if confused post comment.

Mobile Friendly algorithm  
Actually 70% of users using internet from the mobile device only. so we have to more focus on mobile rather than desktop.
making a mobile friendly website:

having a mobile website m.yourwebsite.com or responsive web design or the separate template for a mobile website by using wp touch pro plugin in WordPress or jetpack mobile template plugin.

Also influence desktop results too.
penguin3.2
(targeted for bad link profiles but also mix some quality signal to it when a major update rolls).
niche website got up keyword stuffed website down.
Panda  panda is now manual action to protect quality websites.

other parts manual Actions

Thin content
if you received thin content penalty that means your wholly website treat as the bullshit it very hard to get back. you may want to know about fixing thin content penalty or panda.

• Doorway, scraped, affiliate sites with rel Nofollow, websites with without text in case embedding videos.