Adwords Expert to Improve & Optimise Ad Campaigns

We currently run 5 low budget campaigns for our website. These have been running for a long period and we are now looking for an expert that is able to analyse the data and make improvements. The winning bidder will be fluent in English, able to create effective ads relevant to our products. We do have a good understanding of Adwords and are looking for someone that will look at our website, understand our products and target customers. We are looking for someone that will return an excellent ROI (we do not sell expensive items and cost/conversion is critical) If you can produce results with our current Adwords then we will hire you to create many more for all our products.