How to check my seo work is correct ?

i am doing seo for Hotels website- l on page & off page .

keywords ranking is good ( most keywords in 20 th postion) . but i want to make sure whether am i doing correct seo .

Is there any tools to check this .

or

What i need to check after doing on page & off page , othere serp ranking.

Give Me some suggestions

from Search Engine Optimization http://ift.tt/23Zcube
via IFTTT
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