DSL connections are asymmetric, so their upload speeds will be much slower than their download speeds. Upload speeds of between 1 and 10Mbps are common with DSL plans, with faster packages having faster upload speeds. While the headline figure in the marketing for your internet plan will be its download speed, the upload speeds you can expect will generally appear in the fine print.
If you frequently upload data to servers, for instance, if you work from home, or if you game online, you might find the upload speeds with DSL too restrictive and may want to investigate an internet technology with faster upload speeds, such as symmetric fiber.