To make simple syrup:
Combine equal parts sugar and water. For example, you could mix one cup of sugar with one cup of water.
Heat until the sugar is dissolved. If heating on a stovetop, you can use a sauce pan. If heating in a microwave, use a microwave safe container.
Allow to cool, and store in a sealed container.
Use it to turn unsweetened tea into sweet tea. Sweeten cold brew coffee. Turn water and lemon juice into lemonade. Use your imagination!
This can also be used in hummingbird feeders, but the sugar and water mixture must be brought to boiling before allowing to cool.