I started my site long back ,in my initial days traffic is low as usual with other sites but i paid for traffic by which my traffic increased regularly,now i have a doubt will paid traffic increase /decrease my search engine rankings?can it effect my rankings?
I think it would not affect.. I have tried to buy traffic but when I check in my G Analytics paid traffic came from the same IPs.
No it would not effect but that kind of traffic is only temporary you should do seo and built natural links for better outcome
A paid traffic will never increase /decrease your SERP, and the traffic is also not genuine and it is valid if you paying. For checking genuine traffice you can implement Google Website Optimizer tool.