Those terms refer to the classification of offences in Canada. The first, a Summary Offence, is used to describe less serious crimes, such as non-violent crimes, disturbance of peace, trespassing and so on. The consequences of those acts are also much less serious, with fines not over $5,000 and no more than two years of jail time. Another feature of Summary Offences is that they do not require the accused to show up in court unless a judge determines so. It means that a person can choose to ask for a representative such as a lawyer to go in their place to the court.
Indictable Offences, on the other hand, are significantly more serious. The nature of crimes that are considered Indictable Offences vary, and can go all the way to murder. The consequences follow accordingly since jail time for those cases can escalate to life imprisonment, and as such, the accused must go to court in person.
Some cases can be categorised as Hybrid Offences, in which the charges may not reflect the true nature of the crime committed. For those cases, the Crown Prosecutor can request that the case follows the rite of a Summary or an Indictable Offence, depending on the facts they want to present.