Of the three ad slots purchased, one of them looks good. Paid $50 and I already have 65 clicks on 1 week. The remaining two I would say proved to be a waste. My tip would be to purchase monthly fixed cost ads as opposed to impressions if you are low on budget. I am currently using BSA. Other tips and pointers that I gathered from research before starting off are given below: -Research well beforehand 1) Good DESIGN BANNER (VERY IMPORTANT) (preferably with some face) Do something crazy ( use google image to get idea) 2) Banner at a prominent place.Ad Location is everything. (VERY IMPORTANT) -Place your banner in the part of a webpage that's visible without scrolling. For example, tracking a Web page's impressions assumes the visitor actually saw the ads on the website. If the visitor did not scroll through the entire page or was browsing without graphics, all of the page's impressions may not have been viewed. 3) Pick the right niche -check traffic THOUROUGHLY (country, demographics, ect) (Always research the website beyond the niche. Go to alexa and quomcast) -check if a certain website is relevant enough to promote your business -check what other advertisers are promoting on your selected URL 4)Make sure your traffic is TARGETED that's the most important thing then just work on improving your conversion rate with better ads, landing page etc. 5) If possible install a conversion pixel ( I haven't done yet) Avoid buying expensive ad spaces when testing a new campaign. Look for Small Sites and build a list of them that allows you to scale your campaigns. Don't go after big sites and expensive traffic, expensive traffic doesn't mean it is any better or worse. Choose sites with Lot's of text and not a lot of images (makes your banner standout more) There's a lot more actually. You will learn only once you test. I read at a lot of places that 125*125 ad slots are too tiny and should be completely avoided but you see that's the one that is working for me. Paid $50 for 125*125 slot and already have 65 clicks in less than a week. Maybe, not great but not bad for $50 spent. So, try out and see what works for you!!! But, don't jump in with limited budget... Atleast have 1k in my opinion and some more in the coming months so that you can keep testing if you lose that 1k. P.S- look at media buying as an exciting thing and not frustrating thing. If you play around with limited budget, you might find it frustrating when you lose money so, having decent budget is a must in my opinion. So, if you sweat over lost money, media buying is not for you. As told, look at it as an exciting thing. Having that mentality is a must!!