To best answer your question it would be best to know what you are wanting to share. Is it a product, service, affiliate offer or something else.
We have several different options to help you but without know the type of opportunity you are wanting to share it will be hard to say which ones would be best.
You can get a banner advertisement put up on the site and have it seen by many, many people each day. Information can be found here:
https://www.webmastersun.com/threads/776-Advertise-With-Us
If it is an affiliate offer then you can post them here:
https://www.webmastersun.com/forums/127-Affiliate-Programs-Promotion
We also have a marketplace that covers some of the categories and it can be found here:
https://www.webmastersun.com/forums/32-Webmaster-Marketplace-Buy-Sell-or-Trade
It all depends on what you are wanting to share and how much exposure you are wanting. The banner advertisements will get the most exposure for you and the rates for them are quite low for how much people will see them and how many eyes will see them from traffic that we receive.