When creating Meta Keywords Tag:

a)Leave out commas, or leave out spaces
b)List keywords in lower case
c)Do not use single keywors.
d)Do not repeat the same keyword more than 3 to 7 times
e)Keep the site focused by only using around one or two keyword phrases per web page.Other keyphrases we can distribute to other internal pages.
f)Some times We can also use misspelled keywords


Thanks,
SEO Specialist!!

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http://www.flights-to-canada.co.uk