Create a list of the features of your services and then list how they transfer to benefits. A benefit might be something that you help customers achieve, or something negative that you can help them avoid. In other words, how is your service going to make the customer feel, or what are they going to gain? Think about how your service makes their life better, easier, more cost-efficient or more enjoyable and use these ideas to make your text more enticing.
For example, if you’re a copywriter, the features of what you do might be blog writing, on-page SEO, online articles etc. But, the benefits of these activities for your client would be increased web traffic, increased credibility, better search engine results... Get the idea?