Titles are words that pop or scroll onto the screen. They are usually used to introduce a video, and say whom or what it is about. Titles should be bold, simple and easy to read. A dissolve is like a paragraph indent. A short portion of the scene that's ending remains transparent over a short portion of the next scene.
Some camcorders are able to perform in-camera dissolves.
There are numerous other techniques to learn. Start by consulting your camcorder manual to be sure you're getting the most out of the features you have available. Mastering sequences will require a good bit of practice, as will composition. Just remember to make simple shots, avoid clutter and focus on your subject's eyes in the close-ups, and that sometimes the best technique you can use is just fading to black.