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Some sites are earning less others more is what I see
mostly because I've neglected them while developing the new ones
All the more reason to work on my other channels, because mine may catch up to the rest at any point
We're a small site and are doing better than ever. CTR is up; epc is up
So you are suggesting new channels in terms of ad network or new niche sites ?
And no - I don't sleep
the most important reason in my opinion is that the way people access the Internet has dramatically changed from desktop/laptop variants to mobile devices
My analysis shows that, in the last quarter, the average costs per click (CPCs) have declined significantly in the last quarter (-16.5% for Google Search, -18.2% for Google Display Network), while click-through rates (CTR) were mixed (-12.4% for Google Search, +13.8% for Google Display Network).
Offsetting those declines are an impressive growth of ad impressions and clicks (clicks were up +21.6% for Google Search, +29.1% for Google Display Network), which more than made up for lost revenues.
My take is that the trends we’re seeing in the Google economy create a win-win for both AdWords advertisers and Google.
A larger available inventory of impressions, combined with lower CPC, means that PPC advertisers are now literally able to get more customers for less money.
It also opens up Search Engine Marketing to more advertisers, including perhaps advertisers for whom the economics of search might not have previously worked out at higher average costs per click. (Just as SEO is harder for small businesses with lower budgets, so is PPC.)