Geez. You can put it in a frame and hang it on the wall or sell it to an antics dealer. LOL.
Seriousely, you can take it to your bank and ask them if they still buy such a thing. Legaly such paper is valid forever but some bank may refuse to buy them because everything is done electronicaly and this is too boring for them, especialy for one share. In any case they will tell you where to go if they don't.
The dividends, if any, are represented by coupons on another pages following the certificate. In a not so distant past, one had to go to the bank, present the certificate to a clerck who would cut the coupons out and give you the money in cash. But usualy certificates were held at the bank and most shareholders didn't have to do that.
Only those who kept teir titles at home had to do so.
This should still work today (as I said these certificate never expire) and normaly they will pay you all the coupons since 1988 or at least all those still attached to the certificate!
HTH