You probably tried to google about how to get free Instagram followers and tried every website that showed on search results either on Bing or Google.
If so, you are not the only one that does that. In fact, there are 27,000 people that search free Instagram followers on Google per month and it is increasing drastically because Instagram is becoming more popular.
Be careful because some websites have those sketchy login pages and it will ask you to log in via Instagram. It may be a phishing website or will just ruin your Instagram account.
Some of them are not real and will just save your Instagram login details. Also, check the website if it has HTTPS on a lock icon on the browser bar.