how can i put a add on here for my place

[marlboro Foxclaw]

how can i run a add on here

[Rolig Loon]

You can't.  According to the Community Standards: "No advertising or promotion of specific Second Life merchants, Marketplace listings, products, or services, unless the forum area is specifically for the buying or selling of Second Life products or services, for example, a “for sale” or “wanted” forum. Do not reference other websites offering any product or service."

You can place a Classified Ad in world >>>> http://community.secondlife.com/t5/English-Knowledge-Base/Classified-advertisements/ta-p/700049

or you can sell items on Marketplace or in world and use appropriate advertizing in those places. See >>> http://community.secondlife.com/t5/English-Knowledge-Base/Selling-in-the-Marketplace/ta-p/700193

and >>>> http://community.secondlife.com/t5/English-Knowledge-Base/Selling-objects/ta-p/700143#Advertising_rules_and_etiquette

[Charolotte Caxton]

You could put it in your signature.