The covering of sins by love can be understood in the broadest sense, both with respect to those who love (cf. Jas 5:20) and with respect to those who are loved.
For the latter, under the influence of love, may become gentler and in turn may exert a beneficial influence on others (cf. Prov 10:12).
As special, particular works of love, the apostle points to hospitality (cf. Rom 12:13; Heb 13:2). This work, like all works in general, he commands everyone to perform according to his means or gifts of grace.
In the first verse one may see an indication that among the first Christians there existed, among other things, certain special gifts (cf. 1 Cor 12:4).
These, however, were not gifts independent of God, such as uncalled teachers sometimes boasted of (cf. 1 Tim 1:7).
Among such divine gifts the apostle points to the gift of teaching and the gift of service. By service one may understand the manifold church and prayerful ministries in which he earlier advised them to spend their time while watching.
"To this," he says, "I exhort you, so that God may be glorified in all, whether they be pagans or those near to you."