Is it a good SEO tactic to re-name our company blog with our main keywords?

[safiaabbasi]

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[frnprz]

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[generalzod]

In a word: No.

By doing that you a) get closer to being over optimized and b) your current URL has a PR of 4 and decent page authority. You'd be giving up both if you change the URL.By all means change the Title tags and meta description, but changing url WILL hurt you more that it will benefit you.