Ours is an internet economy and you as a senior citizen can also make some money provided you find out the various ways to make money for the senior citizens. That said there are hundreds of ways to make money on the internet. This applies for everyone including the senior citizens.
The best way for senior citizens to make money on the internet is via blogging. It is very easy to set up a blog and then start putting up content on it. As far as the topic of the website is concerned there are thousands of topics to write about.
You use this blogging method to generate money via the Adsense or the affiliate sales. If you have money to spare then hire a programmer to build up a website for you and then hire a content writer to write some good content for you. That is how you can make money as senior citizen on the internet.
Next is to enroll yourself as a freelancer and you can easily make money via offering some services at which you are good at. For example if you are good at writing then make sure that you offer your writing services for report writing or article writing.
Next there are a lot companies on the internet that offer you money to do online surveys. You can enroll in these websites and start doing surveys.
Product reviews is another way to do make money on the internet. This way you just have to do a product review and make good money.