Revise for Unity

Unity in writing means that all the points are related to your main point: They unite to support your main point.

Sometimes writers drift away from their main point, as the writer of the following paragraph did with the underlined sentences.

Online dating services have many benefits, but users should be aware of the possible negatives as well. One benefit of online dating services is that people do not have to cruise bars to meet people. The Web sites offer subscribers potential matches, and the first contact is via e-mail. Contact via e-mail or text allows users to get to know each other a little before meeting. Sometimes a couple of exchanges can reveal that meeting is not necessary, so not only do users get to avoid cruising, they save time by eliminating bad matches. The services also try to match compatible people by comparing profiles, so the likelihood of having something in common is greater than in a random encounter. With all the online dating services available, people can choose ones that appeal to people with specific interests and preferences. A good place to meet is a cheap restaurant. Most people like Italian food or burgers, so those types of places are safe. Also, online dating services offer many choices of screened possible dates, more than anyone could meet in a bar in months. On the negative side, online dating services can be expensive, and there are no guarantees of a good match. Also, although the companies do minor screening, nothing prevents a person from lying. People often lie about their age, weight, and appearance. Arranging a date through a dating service can put more pressure on people than meeting in a natural way because people sometimes have unreasonably high expectations. Online dating services can be successful, but people should be realistic about what to expect.