Surveys (or Polls) is the method of asking questions and soliciting feedback from a representative population on a specific topic, idea, product, etc.  The survey consists of specific questions and ask the respondents to chose a specific answer to each question. 

The respondents in the survey are specifically chosen based on demographic information.  For example, if you want feedback on a product then you would seek out respondents who are likely to buy and use your product.

Surveys should be carefully design.  It's important to ensure that your survey is designed in a way that allows data to be easily quantified so that you can derive meaningful trends from it.  Don’t ask general questions.  Ask to rate on a scale (1-5) or Yes/No.  For rate the price of this product on a scale of 1-5 with 5 being the best.

As an incentive you can offer to give every respondent your product/service for free.

There are online resources that lets you create, your survey, select your demographics and respondents from their databases and analyse the results of the survey.  These resources includes the following.

SurveyMonkey
Looking for the right people to fill out your survey? Meet SurveyMonkey Audience, home to millions of qualified respondents ready to take your surveys and give you the feedback you need to make better decisions

Surveygizmo
Chose from 4 paid plans.  We have more advanced functionality than most online survey tools but we keep it simple to use so you are not overwhelmed for simple projects… but have all the power you want for advanced surveys!

FluidSurveys
You can create your own surveys, or use professionally designed survey templates & questions. Collect responses online, offline or via mobile devices, & analyze responses in real-time.

Polldaddy
Pay monthly or yearly.  No limits on content creation or votes.  Collect feedback from the web, email, ipad or social media.  Generate and share easy to read reports.  Chose from the free or paid plans.